Stock As expected return and standard deviation are E[rA] = 8% and A= 15%, while stock Bs expected return and standard deviation are E[rB] = 12% and B= 21%.

a. Determine the expected return and standard deviation of the return on a portfolio with weights wA=.35 and wB=.65 for the following alternative values of correlation between A and B: pAB=0.6 and pAB= -0.4.

b. Assume now that pAB=-1.0 and find the portfolio p of stocks A and B that has no risk (i.e. such that p=0). Can you do the same when pAB=1.0? If not, why? If so, find that portfolio.

c. Finally, assume that pAB=0. Find the standard deviations of portfolios with the following expected returns: 8%, 9%, 10%, 11%, 12%, 13%, 14% and 15%. Plot the expected returnstandard deviation pairs on a graph (with the standard deviations on the horizontal axis, and the expected returns on the vertical axis).

Please help me step by step. I have no clue and really need help on this. Thank you