Problem: a rectangular parking space is marked out by painting three of its sides . if the length of the unpainted side is 9 feet , and the sum of the lengths of the painted sides is 37 feet , then what is the area of the parking space in square feet ? 
Options: ['a ) 46', 'b ) 81', 'c ) 126', 'd ) 252', 'e ) none of these']
c