Stocks A, B and C are risky securities that have the same expected returns and standard deviation. The following table shows the correlations between the returns of these stocks. Stock A Stock B Stock C Stock A Stock B Stock C +1.00 +0.80 +0.10 +1.00 -0.40 +1.00 a) Given these correlations, which of the following portfolios should an investor choose? 1. Equally invested in A, B and C 2. 60% in C, 20% in A and 20% in B b) Suppose an investor can borrow or lend at risk-free rate of 6% p.a. Which of the above portfolios should he choose to combine with risk free borrowing or lending