8. (10 points) Sections 2.1-2.3 a. Let f(2) = (23 - 3iz + mi)-2081, calculate f' (2) at all points where it is continuous (no need to find the domain) and then calculate lim f'(2). 2-+00 (2z + 1)2 b. Let f (z) = (22 + iz + 1)3. calculate lim f (2) and then calculate f'(2) at all points where it 6-1 ; 2 is differentiable