How much would you have to invest today to recelve the following? Use RpendixB and RpendxD for an approximate answer, but calculate your final answer using the formula and financial calculator methods. a. $15,000 in 10 years at 14 percent. (Do not round Intermedlate calculations. Round your final answer to 2 decimal places.) b. $19.500 in 20 years at 15 percent. (Do not round Intermedlate calculations. Round your final answer to 2 decimal places.) c. $7,900 each year for 19 years at 12 percent. (Do not round Intermedlate calculations. Round your final answer to 2 decimal pleces.) d. $54,000 each year for 50 years at 10 percent. (Do not round Intermediate calculations. Round your final answer to 2 decimal pleces.)