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4. You are considering purchasing a consol that promises annual payments of $500. a. If the current interest rate is 4.5 percent, what is the price of the consol? b. Suppose the interest rate rise to 5.5 percent in a year. Compute the percentage change in the price of the consol and the percentage change in the interest rate. By how much percentage the price and interest rate fall or rise? c. Suppose you purchase the consol when the interest rate is 4.5 percent and sell it a year later, following a rise in the interest rate to 5.5 percent. What is your holding period return