Hi, please help me do the part b c and d

Q30. Roots of Polynomials. Find the roots of the following polynomials, using the complex exponential and roots of unity where necessary. Express your answers as sets. (a) z4+ 422 +4 = 0 70 4 501 = 9710(b) 24+ 422+16=0 ( c* ) ( 2+ 2) 5 - (2 - 2)5 =0 401 - (d) 24 + 23 + 22 + z+ 1=0 [Hint for (c): Expand both sides using the binomial formula and look for cancellations.] = Y