4. Consider the following securities: (i) an annuity that pays $5,000 a year at the end of each of the next 12 years, (ii) a perpetuity that pays $5,000 a year forever starting in 13 years i.e., after 12 years from today. a. What are the values of these securities at an annual interest rate of 5%? b. What are the values of these securities at an annual interest rate of 9.5%