Simplify the following complex number expressions and express your answer in polar form (Ae) with phase between - and . (40 points) 1 a) +14+j52e 0.15+0.75j 4+j6 13e b) + 1- j3 2+ j7 Problem 3: Solve the following equations involving complex numbers and express your final answer in polar form (A e) with phase between - and . a) (3+j)x=11+j7 (10 points) b) (3+j4)x+(4-j5) y = 18+ j13 (4-j2)x+(-4-j5) y=-5+j10 (20 points)