bill formed his optimal complete portfolio worth $1000 out of 2 assets: a t-bill with a return of 5%, and a risky portfolio p with an expected return of 15% and a return volatility of 20%. bill's coefficient of risk aversion is 2. which of the following statements is true about bill's optimal complete portfolio? bill invests nothing in the risky portfolio p. bill buys $500 worth of the t-bill. bill invests $1000 in the risky portfolio. bill borrows $250 at the risk free rate.