Express the following complex numbers z1 and z2 in - AC Analysis

Complex numbers z1 and z2 are given by
z1 = 6 − j4 , z2 = −2 + j1.

(a) Express z1 and z2 in polar form.
(b) Determine |z1| by using complex conjugate.
(c) Determine the product z1(z2) in polar form.
(d) Determine the ratio z1/z2 in polar form.
(e) Determine z1^2 and compare it with |z1|^2.
(f) Determine z1/(z1 − z2) in polar form.