pls help find how much sally will need to save annually!! i will vote:) thank you

Sally Mander wants to set up a perpetual annuity for herself that will pay $68,000 annually that will begin 40 years from now. Assuming an interest rate of 7% and with the impact of inflation of 3%, how much will Sally need to save annually? O $6,892 O $7,890 O $8,515 O $5,894