b) Calculate the expected return, standard deviation and coefficient of variation of the following securities. Also make a plot of risk and return by using the data of following securities and explain which security is best for investment? (15) Economy Prob. T-Bill Coll USR MP Recession 0.10 8.0% 28.0% 10.0% -13.0% Below avg. 0.20 8.0 14.7 -10.0 1.0 Average 0.40 8.0 0.0 7.0 15.0 Above avg. 0.20 8.0 -10.0 45.0 29.0 Boom 0.10 8.0 -20.0 30.0 43.0 1.00