1. Use formulas or Excel to solve financial questions: a) Find the simple interest for $4000 at 5% for 9 months b) Find the compound amount for $5800 at 6% compounded monthly for 10 years c) Find the amount of interest earned by deposit of $3900 at 7% compounded annually for 9 years d) Find the present value of $52,000 in 8 years, 5% compounded monthly e) Find the amount of payment that must be made into a sinking fund to accumulate $70,000; money earns 5% compounded semiannually for 9.5 years. f) Find the present value of the ordinary annuity: Deposits of $750 annually for 5 years at 6.5% compounded annually g) Find the monthly payments for the mortgage. Calculate the total payments and interest. $250,000 at 6% for 30 years