Task: Question Answering
Input (English): Problem: if the operation ø is defined for all positive integers x and w by x ø w = ( 2 ^ x ) / ( 2 ^ w ) then ( 4 ø 2 ) ø 1 = ? 
Options: a ) 2 , b ) 4 , c ) 8 , d ) 16 , e ) 32
Output (English): c