= 2. (20 points) Consider portfolios constructed from two assets with (random) rates of return r and r2. For the first asset, (01, 1) = (1, 1) and for the second with (02, 12) = (1,2). The correlation of assets is 21,2 = {, SO 01,2 = cov(r1, r2) = 010221,2 = 64- a) For the portfolio with fraction 1- a of asset 1 and fraction a of asset 2, let rp(a) be the (random) rate of return of the portfolio, let p be the expected rate of return and let of(a) be the variance. Write out the formulas for rp(a), ip(a) and for of(a) = cov(rp(a), rp(a)). Simplify, and check that your formula for o(a) is a quadratic in a that agrees with o (0) = o = in and of(1) = o = b) Find the minimum variance point