Bi 2 Consider the difference and the derivative (if any) of the following functions: 1) f(2)= 2xy + 3xyi 2) f(2)= x + y + 3(y x) d - 3) f(z) - 2(1+1) Im 2 -2 4) f(z) = z+z.z -2 +2z-z 5) f(z) = ei +3z + 6iz