Please answer parts A and B and show work so i can learn thank you i will leave thumbs up

For interest rate i, you are given an=7.8 and a2n=13.44. Find i. i= Janet receives a \$10,000 life insurance benefit. If she uses the proceeds to buy an n-year annuity immediate, the annual payout will be 998.32. If a 2n-year annuity due is purchased, the annual payout will be 832.87. Both calculations are based on an effective annual interest rate of i. Calculate i. Effective annual interest rate, i= %