Pleas solve a$,$ b$,$ c

Suppose the risk$-$free rate is $5\%,$ and the average investor has a risk$-$aversion coefficient of$,$ and the standard deviation of the market portfolio is $20\%.$

A$.$ What is the expected return on the market portfolio?

B$.$ Suppose we estimate the beta of Delta as $.$ Based on the CAPM's expected return$-$beta relationship, what is the expected rate of return on Delta?

C$.$ Suppose Delta is considering a new airline route and it forecasts an internal rate of return of $11\%$ on the investment. Based on the estimated expected return on Delta in Question $B,$ do you have to accept or reject the new project as a financial manager?