CINXE.COM
Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "www.udacity.com",cType: 'managed',cRay: '9157ef7c1cc3fdfe',cH: 'zHO_i1WGfjSTeEEV3MWj8IhqEgiB5Ts6EjqLhwE6ES8-1740153481-1.2.1.1-BLV62.K28ZdrYXkhCIEQ7sqSQeKh0_NVi8WeadMllo0PzCI_QMykmqzhGIGJQiud',cUPMDTk: "\/course\/google-analytics-nanodegree--nd253?__cf_chl_tk=UZozEzUD4cfeaOK_qCGt_4vl4P8RStQr2eUBfcb.9.4-1740153481-1.0.1.1-hnhg.KskaOB.FfScDJWogNLCf7kR2Ndwlh.Y9yRo_20",cFPWv: 'b',cITimeS: '1740153481',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/course\/google-analytics-nanodegree--nd253?__cf_chl_f_tk=UZozEzUD4cfeaOK_qCGt_4vl4P8RStQr2eUBfcb.9.4-1740153481-1.0.1.1-hnhg.KskaOB.FfScDJWogNLCf7kR2Ndwlh.Y9yRo_20",md: "eWR3LI9DYfGr9Nx5wFnvka2lv9lmXPk6BQvKykuo1Vc-1740153481-1.2.1.1-XTvbPs03CNVx36DFDxLoxvYsl171tYykEc.do7dlbogldakcMlTsNGZyDQxKZxdM24t2SBJpp20nPJaB.Ya5M.hNVmwwR4ifwweqQpNT5XNDiCgVqK_4RbZ_yCNdXiMWn_9deBPTmj4Hd9IhXoqqDWA.sbUdG7Jk6VFs7_w2LsNWf8aTI4OJzid7Z0NKUGaIpFaRCuq4PAzjCwmtV84eH7aQmOaQ8opCB1olzdtfEVNc0KbegXCAKQuwUBwnjABBVSAKYlGdQ1TNx6V.mp6D_nkf5Ld14aiFiy4DY2yYzjQKtN5QwHI9TONs1W8clWaSfppjBmPxr6uFk3G.cG8kjk6DviBFy_.uTKNwLjS4iqjrpVOyF.nqdmE21hpS7EZ6Pk.4KgeHhx9yzw6NBxTjjljl.HASQ2_GOnMXLXPKF2j_WMaR3cfu0mPqmsaiEIjTIGGbdDgKzqM1mQ4SE1j8g1igUAtR3yRX.jTAs0SK7gwnFzEqwCmkhlmwpFF9QTr_m2WymF53M_IL.lpFVxtkFR4Vu2GUF2ihvsINHZMn9IAd.RbYxKrVEpNec9G8ZFvw2w6EAmiaZ4b0Eh7LMgBwPvt0VU89_GU2kQcTFNUamkUBLaBXkAjxy5w088PBD6KxVX4Rd_ibBNl.6E_xZtiIugMOzpwCjfKqVIgtZC.jDPeWW3FNN4GBZSv0R5IREtIbn2hU4jGXuw58qPcSdhpeDbCvHq.PG_fXn8HY4zKvnS0oXTmz1c5vZbBsE4fYW70jB80J4Eth4uo8wViT8vtvk3nhTxPvcYfZ6qmSnPBUwRksMRHfvmcYSiA7Ojlx3hs8dOVfETD_d1CsxLpq8agbzWyONDDukGU2Zu6dT02PUbrNE.H9YuPeyJNf2j8LO42TDZV9pzzSA3vmaSOiUfX63_Yn3c._Yvj0GdmoRr53VEW5UuZa1Kdnj9BAU3VxsBYUYgeU2gnUAnn8SfXvDD1AkkCCkSNLkvLbNgxQ7xteBjiAb2vZ3H9HviG75PoNKkBHZRMg__opQ2mIO_gdxbWsKjS8MY7dD_e.90I2UlKLZ7dxE.MeBczJbANJT2U7qO_R__3wXxNyZ8vZJMrLKTGneP4ghvkXF1ytNdv.M6TQDeIRPXhMWB3.PFdD6il_eF4cUd06qx78jFOGEnD8MniWNbNc9dZdC2sfQq5gypw5SDmIN7_KjoWcwi.h.QlgJLTIy_ZnkuRSeNqjCWoyVsf5SjgMIdfjtpmm8kLsKe1SJmX99TaPqMMZSAw1uEbvwVYhQ1wbHIUwpYYxojHzPdt.J5SbtaCfWqwZf5ZqNNYjLoTSimDdZdGhgYkgxt4J9OEIM0R9q375KE5xBUBE52jnmuu3NGyEeAkrv3Oi7ZoNglv609kHpl5NMB6fap1EhYXWfoWNESmBT9sj75S.7zC3.DEC79AEfFg.xtS00VoWdRY97jP0xa.5OtkRiFkhWU2nXv0HJ7WuiCWRlskoX3Xdv0ohCm4ca9lD8DHYuhw1vJMVyw2AOya74GdjoAhr9wZiJGXxH4ZmAxZMb5i61pMONbY4KobZtPDN8pyVw0rePOTPtj0Ged0FLLby_R5neWF5J6YKfb8qQDmBAYagGG7cTFZHZ6Jd1za9E1LANR9cq6FQuS14xX6.1ME7SSagCJSqfsJ6OUiSYcz7.IAfFUQEMBk7nfaNCcp1Z9iUilStb6aTE8GoiKAvFVLQ7S8ozS132SkJzpy565EfXjghCQVvbdGNWh_sdmh3G8h2oulTlMV9yHWQtGbgEkpK9cjMMm5faOc.FMGK7e4ZOrHLT519x5ICuu8t5g9kvxQgTVAlcd0OqZAbX7tukTEpyFxFag8batVHIZv.kyDLzbk60txcL0X2vqoZQis4_d.7FUZmr84P6pLA1_gjJC2MKYP6eL5_BANdC.HQ8v5I6bf_PEtNb.FVSZ5RcDhcdQuliHGmPSfwqkzJsQu.XcY3Dkdgm3r7TUOyKU7bAcYhDFbOROhc.RJ5zxvBcGzO8lOAyRxQ5zbAdLH4xXRW6TT2MtX_X0wx_3U8vaE2XQdVYIn_Vm3eFx1cspu68G.ywPwekpz5uxoXoSaPuE3a_fEqnyepVYp_agxiZxciKO9kM_EMoHUZTGHpmsBoSGDYFF9DW33ebSoeypuzsm1cn16sld7pZ595EoEVce597b3qqA6wfEu2Q2u3u7wcOKhDbg43gPAr9jN2hyKUsR8NuPKkT4XN7K5pOgBbVarxrpkkPFdx_Dogsi9Na37POshWpzAh1SyT4.r2pUXa.XmCjLkeh9o2C8Q3n20X_AHE8p.jVgM_dvkSj8LQSh_KYgaiylmRKWRAR_bYTbTckxs9Sq.OdW0lh4qSr4rz3CBk8bLWAvH9lB.ff2uWrKkZhsMa8v6ctEU52ImLabu9UHfhetCFNC7itTDSF_t9skQ0EFG4p79FdRdqbEh.or3VDPEkuz5ZaA0HxMDEvxQj0b4dEhFnbjZVOp4dHFdDzk3R.CKke7uXfqVPMoX_CqORx5iWskdnw1muk0MnOUpUx_kjYaH2CC6QilXHVWsCgy75I8NBwTEVrV6eyk_QUXHL0rYHk1qa66Q58NI",mdrd: "ZYeT_0T4mk2Fi0hPdGw7xuhjJJLvCs5mqWSNl.EL0d0-1740153481-1.2.1.1-L1egVbOCgnC1d2o5S9ARkqzY_W9isjJ1wGmTac1LF73l7Ck0CsOpevY.QkHeWG3l.L8A7TwwVBqTCx4Cjf8yULe9BvSyE9eQ0rbftud8stbGs1l2lDl1hNO6hJSQ2oW2.77RIEwVllN28uQQckfrhNbdMz0y9WeVtuqBlW25RYD2L.W5LFnSNT5_e8FBfAV.kdCjLzqgCnjlFkjCI9VsSAPb2qGcDYYo6lIwxb10_FXXpf7lOyMJHSPwgZFDlGK.3Iwgvcwm9uoIuMtxcFFL7ozwEgfsNtasLSZ7IxEH2QfjR6ect3PUkip_6UsJGSbDo.QHIQ.WCnu6_v9mFFQdmgx.l2J8brzw35XopXazNsgayvYNs0cyUMy_F0SmvMA7FltzLbK81MlwkNlIXOldsvS7tr5ofeLBKpB_HgQ92Y0Xwau9Fg7Q3P_eBNqcgvG4xPraCbSkmtE_iLBPaXh2RYMrrzskGLuzLGxFdPaHd.hI4r9exeRrb4G7qy3ZhUZg5V9FiCtUUtwKfS50bl4dtSyRV8qovCunMZPgEdvNT6AZUB.xVHT2JsrlNyLeQdP1bC9Efq1d3QM61QA.EtmIIbBr4bp3EWEGeMr7RwVMtgwDrpHalPrWJjpE_p2cAesK7se.VPX_6EP7qLWDY8v60Da1UV2un1qq48T1EYWrwYMPjgcGEFSdqNUehoAxhooRMJFzhGiGnL6EftRlwQJYEUw05kMNiChh2x_Xvs3IISzXgkdX4rWfWKccUUnskEuCYxTH7Lkt2Cjwh_XwkrzIYqrL_xYFni7yRtpQyF.6lcF8zl_Tljp1VP8G.ha50Hi7y4TAlSw9OkxCpq9SAYsF3qIcaCF9QOiqjoXjnrUI73Tt2kWYdeUBSBnRDMNLDzyhlDuNmyxK03Q6QXX_JLOAWcDTrDaZddPPXlAXPFqJgHdoESHGoLAKmGyChd2OluHlVTtEOxZcs8rE_6yY45S.hddBCPEZSCyj0ubiUjP3ApwwXdVm8LT_fxWo6mi5EdzFs66xN5NMSGFZiCB76p8s3s4WzHCJ8pQgnK7SDCwyvGiHA4q1kmIAMv2oVBf804BHGcRywB0BmqVJY5f9hq6KUVb0O7WspjQxXdUGp_iFv7MaM_qVPWOphUgyKStvJt3T7ejZZhMCx4T6NzbNkftyjp3sSq5ilLd6yzIEWvuxNFkomc8JLs6PTgUk5eJ1GlprUme7PGZeXkPnKKC4Dn8NFktHFO5QRCFYdqFUC1OU7ZqcEpbrVBaKhmv3mK7So5au0IoIKww2xk29KF34P2TsbiYLstEL4KRP4yIvmpbTWyAZATfQZ2gDV6HjNkTVxOu2iwsvjXQGeUjQO.MR4yXxNrq58_ci.jEmJ3oA3W1Qo3z8Pu_Ev6M5AoKIQ7YXmW4I929tlgfgQCr.tLz7eIsdfndPsMwmtynXUrHG2znxkfbegRq9r.C0xCksLqp1CwBEzgfs5JZN4IW1pti61MBMvYwwFpt._rxJFYbzeK9BGjchz9aBt.424lOz7ZrJhvLGuRYwRiKf6TThI.qKRwpXGQRp4RnQ37kZuXGhxBP0L98.7czycb3kZMHDabeUbESd1HyImk0XAoX7RAO9za02pZFxuPtqdxDfENxnKMXj0ajOHG2krdaagYH0RutvJo2JSLKxYImWh3aCjOLf9Zd1M2UPR9deW944IdGosk2VhY4zMurH1fPXkGXDaeggHxF08UP.bRFjljDrn6tbshWY9o_ldIoVGEQAKziHluwoyF0qwyGzSPLPm58adN5VPJCmYz14Pbl2TxKoasrznX.DzJVon5zSzw1hl7HdvCELOSH5UH6.81vkUO10F44b1eo_AVkYhZZ8I0nlkWJyWHp3aXgrgwgTZdPQ4UWOMkqGo4aPCQSQ5PBi3OW2mvZoYry89Ddg_Igy8OQxo7SPMOZcJeUd2X09W2rOju.Ll5a_5C8"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9157ef7c1cc3fdfe';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/course\/google-analytics-nanodegree--nd253?__cf_chl_rt_tk=UZozEzUD4cfeaOK_qCGt_4vl4P8RStQr2eUBfcb.9.4-1740153481-1.0.1.1-hnhg.KskaOB.FfScDJWogNLCf7kR2Ndwlh.Y9yRo_20" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>