$11-19$ Calculate the $95\%$ prediction intervals for the four different investments included in the following table.

$12\mathrm{.}31$ Suppose Autodesk stock has a beta of $2\mathrm{.}16,$ whereas Costco stock has a beta of $0\mathrm{.}69.$ If the risk$-$free interest rate is $4\%$ and the expected return of the market portfolio is $10\%,$ what is the expected return of a portfolio that consists of $60\%$ Autodesk stock and $40\%$ Costco stock, according to the CAPM?

$12\mathrm{.}33$ You are thinking of buying a stock priced at $$100$ per share. Assume that the risk$-$free rate is about $4\mathrm{.}5\%$ and the market risk premium is $6\%.$ If you think the stock will rise to $$117$ per share by the end of the year, at which time it will pay a $$1$ dividend, what beta would it need to have for this expectation to be consistent with the CAPM?$11-19$ Calculate the $95\%$ prediction intervals for the four different investments included in the following

table.