a. Distinguish between systematic risk and unsystematic risk. (4 marks) b. NCB stock Grace kennedy stock Rate of return Probability Rate of return Probability 12 0.15 -10 0.20 15 0.20 17 0.18 18 0.30 15 0.32 -9 0.20 12 0.14 20 0.15 11 0.16 i. Calculate the expected return for Ncb stock and Grace kennedy stock ( 8 marks) ii. Calculate the standard deviation for NCB stock and Grace Kennedy stock. (10 marks) iii. Calculate the coefficient of variation for NCB stock and Grace kennedy stock. (3 marks)