[4] 4.51) Consider the complex numbers 21 = 1 +i and 22 = 1 1' and let w = :1. 2 Write the complex number n: in the form a + bi, where a and b are real numbers. Find the modulus of 11:. Write to in polar form. [4] 4.1)) Find the roots of z2 + 2z + 5 = 0. Express the roots in the form a + bi, where a and b are real numbers. [4] 4.e) Let z = maa/8) +sin[1r,/8). Find z\". Express your answer in the form a + bi, where a and b are real numbers