What is the present value of a 7-year annuity of S175 plus an additional lump sum of S1,000 at the end of year 7 if the interest rate is 5.5%? What is the cost of an investment that will produce cash flows of $250 at the end of the next 5 years, then an extra lump sum payment of $500 at the end of the 5th year at an interest rate of 5%? How much would you be willing to pay today for an investment that pays the following cash flows at the end of each of the next 4 years if your required rate of return is 9% per year? Period Cash Flow SO $100 S200 S300 $400 4