PLS PRETTY PLS HELP WITH ALL 3, I KNOW IT IS AGAINST CHEGG GUIDLINES BUT PLS I NEED IT SO BAD

You borrow $21853 to buy a car. You will have to repay this loan by making equal monthly payments for 14 years. The bank quoted an APR of 18%. How much is your monthly payment (in $ dollars)? Over the past 3 years an investment returned 0.2, -0.08, and 0.09. What is the variance of returns? A project has a beta of 1.04, the risk-free rate is 2.2%, and the market risk premium is 7.4%. The project's expected rate of return is %