(a) The market index experienced the following returns over the first 6 months of this year: Month Return Month Return January 0.68 April -1.71 February 5.43 May -2.44 March 1.12 June 3.58 What is the average return and standard deviation of returns over this six-month period? (6 marks) (b) Security A has an expected rate of return of 25 percent and a beta of 2.5. Security B has a beta of 1.20. If the Treasury note rate is 8 percent, what is the expected rate of return for Security B? (4 marks) (c) What are the two components of a securitys risk? What can an investor do about them (answer is limited within 200 words)? (3 marks)