3. Use De Moivre's Theorem to determine the cube root of Z and leave your answer in polar form with the angle in radians (a) Z: 1+r'x/5 (5) 4. (a) Plot the following points in the same polar coordinates system 2r 3: 7r 2: (3'1) = (311), (3'7), (371) (3' 2 (b) Convert into rectangular coordinates: (ck7\"). (3) MAT151 1.11 01 02022 (c) Convert the following rectangular coordinates into polar coordinates (r, 9) so that r