Can someone help me please

Thanks

Edgar

1. For each of the following functions, find the order of the pole that the

function has at the point a and find the residue.

(a) z−3/[(z−1)(z−2)] , a = 2

(b) exp[iz]/z^6+1 , a = exp(ipie/6)

(c) z^2/z^2+1 , a = i

(d) 1/(z−1)^3(z−2) , a = 1