Suppose the Australian share market has an expected annual return of 12% and an annualised standard deviation of 16%, and the yield on Commonwealth Government Securities is 3%. Also assume that margin loans are available for leveraged share investments at a borrowing cost rL of 5% and with a standard deviation of L of 2%. Calculate the standard deviation of the return for each of the following investments:

b) An investment in the shares of a company, which has a beta of 1.6, and residual risk v of 30%