Problems in the Android Studi - .gradle - git.exe - Failed to sync Gradle project -

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when start android studio there's message 1. can't start git: git.exe path git executable not valid. fix it.

2 . failed sync gradle project 'app-android' error:unknown host 'jcenter.bintray.com'. may need adjust proxy settings in gradle.

enable gradle 'offline mode' , sync project learn configuring http proxies in gradle

3 . in addition error in .gradle

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