(a) let z 2-4, and w = 8efj (i) show that w 6.47+4.70j, correct to 2 decimal places. ) calculate z+w giving your answer in cartesian form, correct to 2 decimal places. (ii) express z in exponential form, correct to 2 decimal places. (iv) calculate zw giving your answer in exponential form, correct to 2 decimal places. (v) obtain the third roots of w giving your answers in polar form, corect to 3 decimal places. (14 marks) b) solve the following equations for the values of x in the range 0 x