Simplify the following text for a Grade 9 native English-speaking person.
Original: Mohammed Zahir Shah ( 15 October 1914 -- 23 July 2007 ) was the last King ( Shah ) of Afghanistan , reigning for four decades , from 1933 until he was ousted by a coup in 1973 .
Simplified: Mohammed Zahir Shah ( 16 October 1914 â `` 23 July 2007 ) was the last King ( Shah ) of Afghanistan , reigning for four decades , from 1933 to 1973 .