Task: Question Answering
Input (English): Problem: what is the area of the square with the following coordinates : ( x , y ) , ( 20 , 20 ) , ( 20 , 9 ) , ( x , 9 ) ? 
Options: ['a ) 121', 'b ) 132', 'c ) 144', 'd ) 156', 'e ) 169']
Output (English): a