Edna is 30 and plans to retire at 50. that's 20 years of saving for retirement. edna will make a deposit into the retirement savings account once a year at the end of the year. once she retires, edna will live for 40 years. edna wants to plan for a retirement pay of $100,000 at the end of each year. the discount rate is 8%. some time-value-of-money factors are available: present value of an ordinary annuity, 40 years, 8% 11.92461 future value of an ordinary annuity, 20 years, 8% 45.7620 what yearly deposit should edna make from age 30 to 50 to achieve her goal?