tolong bantu donggg

fungsi objektif  f(x,y)= 10x + 12y

A(2,4) --> f(x,y)= 10(2)+ 12(4) = 20 + 48 = 68
B(3,6) --> f(x,y) = 30+72 = 102
C(6,5) --> f(x,y)= 60+60 = 120
D(4,1) --> f(x,y)= 40 + 12 = 52
maksimum  f(x,y) = 120