You are bullish on Valcom stock. The current market price is $100 per share, and you have $19,000 of your own to invest. You borrow an additional $19,000 from your broker at an interest rate of 9% per year and invest $38,000 in the stock. a. What will be your rate of return if the price of Valcom stock goes down by 7% during the next year? The stock currently pays no dividends. (Negative value should be indicated by a minus sign. Enter your answer as a percent rounded to the nearest whole number.) b. How far does the price of Valcom stock have to fall for you to get a margin call if the maintenance margin is 30% ? Assume the price fall happens immediately. (Round your answer to 2 decimal places.)