a.	<TextView
    android:id="@+id/text_header"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="@dimen/activity_vertical_margin"
    android:text="@string/text_header"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:textStyle="bold" />