1. For each complex number z below, compute the nth roots of z for the given n. Then plot the roots in the complex plane. (a) z = 1, n = 4 (the 4th roots of unity). (b) z = 2+2i, n = 3 (c) z = -1, n = 4 (d) z= 16, n = 4. 1. For each complex number z below, compute the nth roots of z for the given n. Then plot the roots in the complex plane. (a) z = 1, n = 4 (the 4th roots of unity). (b) z = 2+2i, n = 3 (c) z = -1, n = 4 (d) z= 16, n = 4.