Below are the errors which I am getting
C:\\Users\\Dell\\.gradle\\caches\\transforms-1\\files-1.1\\appcompat-v7-28.0.0-alpha1.aar\\51cd62c84e9404bd66ab4daf25
You need to use more specific versions of your dependencies
compile 'com.android.support:design:+'
selects the newest design support library (28.0.0-alpha) which is not compatible with your compile SDK <28. Change to
compile 'com.android.support:design:27.+'
or preferably a specific version such as
compile 'com.android.support:design:27.1.0'
Similarly for your other dynamic dependencies with + in their version.