Android Studio error AdMob cannot resolve the @ integer / google_play_services_version "/"> symbol

I'm trying to load AdMob into my app, but this error comes up and I'm not sure how to fix it.

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <meta-data android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version"/>

    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name="com.google.android.gms.ads.AdActivity"
         android.configChanges="keyboard|keyboardHidden|
           orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>"
    <activity android:name="com.google.android.gms.ads.AdActivity"

android:configChanges="keyboard|keyboardHidden|orientation|screenLayout
   |uiMode|screenSize|smallestScreenSize" />"
     <activity android:name=".SettingsPage"
        android:label="Settings"
        android:theme="@style/AppTheme"/>
 </application>

      

        
        
        
      

    

Also, the line

    <activity android:name="com.google.android.gms.ads.AdActivity"

      

        
        
        
      

    

has an error saying it cannot resolve the AdActivity symbol. I'm not sure what caused these problems and would be happy to help.

build.gradle

apply plugin: 'com.android.application'

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
    applicationId "com.example.name.application"
    minSdkVersion 16
    targetSdkVersion 22
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'),   '
    proguard-rules.pro'
    }
}
}

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.0'
}