you are bullish in IBM. The current market price is $100 per share, and you have $5000 of your own to invest. you borrow an additional $5000, from your broker at an interest rate of 5% per year and invest $10000 in the stock

a) what will be your rate of return of the price IBM stock goes up by 10%? during the next year (ignore the expected dividend)?

b) how far does the price of IBM stock have to fall for you to get a margin call if the maintenance margin is 40% (assume the price fall happens immediately)?