HI!!

need working out asap, does not need to be neat!

[a] The total electrical impedance Z [in ohms]I when two circuit elementsI 3'1 and 3:, are connected in series, or in parallel, can be calculated as shown bellow: Mf 2221422 Z: 1 1 l =Z+Z Use the formulae above to calculate the complex impedance ofthe network shown in the following gureI where 21 =1+r', 21 = 5 512 and 2;; =1+ 2i. [3] [h] Find all the cubic roots of 1 +1' and represent them 011 an Argand diagram