I need answer with formula and explanation

Click here to view the factor table. (For calculation purposes, use 5 decimal places as displayed in the factor table provided.) (a) What is the present value of $28,000 due 9 periods from now, discounted at 7% ? (Round answer to 2 decimal places, e.g. 25.25.) Present value $ (b) What is the present value of $28,000 to be received at the end of each of 12 periods, discounted at 9% ? (Round answer to 2 decimal) places, e.g. 25.25.) Present value $