未能解决:com.google.firebase:firebase-database:10.2.0

I am creating a new project and trying to implement some features from googles Fire base dependencies such as compile 'com.google.firebase:firebase-database:10.2.0, classpath 'com.google.gms:google-services:3.0.0' ' and sync my project with them. When trying to do so, I get this error:I am creating a new project and trying to imple