Проблема с файлом манифеста

well i have a small app that i am building. so i have 10 activity and inside one of them i have 6 TextView that are gonna open another activity and when i try to come back to the subactivity of the main activity i dont have the back arow. so i want to put them the back arrow. i gave с этим у меня проблема. вот мой файл manifest.xlm

<application
    android:allowBackup = "true"
    android:icon = "@mipmap/ic_launcher"
    android:label = "@string/app_name"
    android:roundIcon = "@mipmap/ic_launcher_round"
    android:supportsRtl = "true"
    android:theme = "@style/AppTheme">
    <activity android:name = ".MainActivity">
        <intent-filter>
            <action android:name = "android.intent.action.MAIN" />

            <category android:name = "android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name = ".CenturyActivity"
        android:label = "Centure Auto Parts"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".AlshamaliActivity"
        android:label = "Al Shamali Auto Parts"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".IndusActivity"
        android:label = "Indus Auto Parts"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".MayadActivity"
        android:label = "Al Mayad Auto Parts"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".ImparialActivity"
        android:label = "Imperial Auto Parts"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".AisinActivity"
        android:label = "AISIN Gallery Auto Parts"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".SpdcActivity"
        android:label = "SPDC Warehouse"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".ImwhouseActivity"
        android:label = "Imperial Warehouse"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    <activity
        android:name = ".WshamaliActivity"
        android:label = "Al Shamali Warehouse"
        android:parentActivityName = ".MainActivity" />

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".MainActivity" />

    **<activity**
        android:name = ".HeadOfficeActivity"
        android:label = "Head Office"
        android:parentActivityName = ".MainActivity">
        <meta-data
            android:name = "android.support.PARENT_ACTIVITY"
            android:value = ".MainActivity" />
    </activity>
    <activity
        android:name = ".HrActivity"
        android:label = "HR Team"
        android:parentActivityName = ".HeadOfficeActivity"/>

        <meta-data
            android:name = "android.support.PARENT_ACTIVITY"
            android:value = ".HeadOfficeActivity"/>
    <activity
        android:name = ".SalesActivity"
        android:label = "Sales Team"
        android:parentActivityName = ".HeadOfficeActivity"/>
    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".HeadOfficeActivity"/>
    <activity
        android:name = ".PurchActivity"
        android:label = "Purchase Team"
        android:parentActivityName = ".HeadOfficeActivity"/>
    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".HeadOfficeActivity"/>
    <activity
        android:name = ".AccountsActivity"
        android:label = "Accounts Team"
        android:parentActivityName = ".HeadOfficeActivity"/>

    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".HeadOfficeActivity"/>
    <activity
        android:name = ".ItActivity"
        android:label = "IT Team"
        android:parentActivityName = ".HeadOfficeActivity">
    <meta-data
        android:name = "android.support.PARENT_ACTIVITY"
        android:value = ".HeadOfficeActivity"/>
</activity>
</application>