Please show work without excel and include formula.

(10 points) Given an interest rate of 10% find the value of the missing payment in year-5 if the whole stream of payments, inclusive of the missing payment is equal to $2,451.62 200 400 400 400 ? 400 400 1 1 1 0 2 5 7 700 4 (10 points) Find the payment amount at in interest rate of 10% 50 50 50 50 50 40 40 40 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 0 1 2 3 4 5 6 7 8 ? ? ? ? (50) (50)