Compute the Utility an investor would draw from a security investing on a capital market that promises a return of 17.8%, if A = 6, the variance of security = 144% and the risk-free rate of return on...

Compute the Utility an investor would draw from a security investing on a capital market that promises a return of 17.8%, if A = 6, the variance of security = 144% and the risk-free rate of return on the market is 10%.

What do the concepts of complete and optimum risky portfolios mean in financial investment portfolio management?