Получение ошибки после добавления зависимостей admob в gradle. (Ошибка androidx)

Question

применить плагин: 'com. android .application'

android {compileSdkVersion 29 buildToolsVersion "28.0.3" defaultConfig {applicationId "arvindo.bassboster" minSdkVersion 14 targetSdkVersion 29}

dependencies {
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:23.1.1'
    implementation 'com.google.android.gms:play-services-ads:19.0.1'

// ... другие зависимости}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
    }
}

}

зависимости {

implementation fileTree(dir: 'libs', include: ['*.jar'])
androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:23.4.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
//noinspection GradleCompatible
implementation 'com.android.support:design:23.4.0'

}