Suppose you use all risky assets to construct the efficient frontier. Now we want to have some fun by changing the risk-free rate. Try to draw the capital allocation line and the efficient frontier on the mean-standard deviation graph. What would happen to the optimal complete portfolio by combining the risk-free asset and the risky portfolio (a portfolio constructed using risky assets only) if the risk-free rate increases? Discuss the new complete portfolio's mean and standard deviation after the risk-free rate increases.