please help with a through b. thank you

expected retum and a 27% volatility Suppose you have $200,000 in cash, and you decide to borrow another $36,000 at a 2%, interest rate to invest in the stock market. You invest the entire $236,000 in a portfolio with a 18% 1. What is the expected retum and volatility standard deviation) of your investment? b. What is your realized retum if J goes up 38% over the year? c. What return do you realize if Jfalls by 12% over the year