A. Two well-diversified portfolios P and Q have expected returns E(rp) = 13% and 10% respectively. Their respective betas are p = 1 and = 0.5. The risk-free rate is 5% and the borrowing at this rate is not possible. E(ra) = In each of the following cases, determine whether or not there is an arbitrage opportunity and, where possible, describe the steps you would take in order to construct an arbitrage portfolio. Compute the certain payoff from your strategy.