pls show me how to do this in excel

3. You are given the following information concerning two stocks: a) What is the expected return on a portfolio consisting of 40 percent in stock A and 60 percent in stock B ? b) What is the standard deviation of this portfolio? c) Discuss the risk and return associated with investing (a) all your funds in stock A, (b) all your funds in stock B, and (c) 40 percent in A and 60 percent in B. (This