(8 marks) B. You are given data of historical returns of company Emy and Ema as stated below: Year 3 2 1 0 Return % (Emy) 4.2 3.2 1.2 1.0 Return % (Ema) 6.8 7.5 4.4 3.4 Calculate: i) Mean return of Emy ii) Mean return of Ema iii) Standard deviation of Emy FIN123 (TEST)/ Page 4 of 4 iv) Standard deviation of Ema (8 marks)