Problem: what is the area a of the square with the following coordinates : ( x , y ) , ( 20 , 20 ) , ( 20 , 5 ) , ( x , 5 ) ? 
Options: ['a ) 60 .', 'b ) 85 .', 'c ) 125 .', 'd ) 225 .', 'e ) it can not be determined from the information given']
d