Question

does anyone know how to solve this problem?

here's what I did:

area=2 obviously.

for prt A:

f(0,0)=18

f(0,1)=9

f(-2,0)=22

f(-2,1)=13

==> 18(2)+9(2)+22(2)+13(2)= 124

for prt B:

f(0,1)=9

f(0,2)=0

f(2,1)=13

f(2,2)=4

9(2)+0(2)+13(2)+4(2)=52

but for some reason they're incorrect answers. Please help me tosolve this!