I am currently working on some financial problems and accidentally asked more questions than permitted on my first submission. Here I have attached two other questions I need help setting up and...

I am currently working on some financial problems and accidentally asked more questions than permitted on my first submission. Here I have attached two other questions I need help setting up and solving for

3) what is the expected return of the three stock portfolios described below?

4) the expected return for a stock, calculated using the CAPM is 10.5%. The market free return is 9.5% and the beta of the stock is 1.50. calculate the implied risk-free rate