Determine the tax-free amount of the monthly payment in each of the following instances. Use the life expectancy tables.
a. Person A is age 57 and purchased an annuity for $ 82,000. The annuity pays $ 600 per month for life.
b. Person B is 73 and purchased an annuity for $ 80,000. The annuity pays $ 950 per month for life.
c. Person C is 68 and purchased an annuity for $ 40,000 that pays a monthly payment of $ 550 for 10 years.