In the following ordinary annuity, the interest is compounded with each payment, and the payment is made at the end of the compounding period. The Osceola McCarthy Scholarship Fund at the University of Southern Mississippi was established by 160,000 gift from an 87-year-old woman who had dropped out of sixth grade and worked for most of her life as a washerwoman. How much would she have to save each week and n a bank account earning 3.9% compounded weekly to have 160,000 after 75 years