9.4 An investment pays $10 000 in five years. a. If inflation is 10 percent per year, what is the real value of the $10 000 in today's dollars? b. If inflation is 10 percent and the real MARR is 10 percent, what is the present worth? c. What current dollar MARR is equivalent to a 10 percent real MARR when inflation is 10 percent? d. Compute the present worth using the current dollar MARR from part (c). need solution, the answers should be 9.4a = $6209 9.4b = $3855 9.4c = 21% 9.4d = $3870.40