The Table below lists expected returns on 8 different Research \& Development (R\&D) projects that a firm is considering investing in. Given the firm's current financial conditions, it will need to borrow funds in order to cover the costs of each of these projects. Suppose the firm can borrow funds from a bank at an interest rate of 5.5 percent (assume this rate is a constant that does not change with the amount the firm borrows). Based on this information, how many R&D projects would the firm choose to invest in