Please answer all parts

Question 4 (Essay Worth 15 points) IE] (02.04, 2.07 HO) An interior designer wants to decorate a newly constructed house. The function f(x) = 25)(2 100 represents the amount of money he earns per room decorated, 1 . . . . X represents the number of rooms the Interior deSIgner decorates, where x IS the number where x represents the number of rooms he designs. The function 9(X) = 5 of hours he works. Part A: Determine the amount of money the interior designer will make decorating the house as a function of hours he works. (5 points) Part B: If the newly constructed house requires 40 hours of work, how much will the interior designer earn? Show all necessary calculations. (5 points) Part 0: Determine an expression to represent the difference quotient for the function found in Part A. Show all necessary work. (5 points) cD |~|jrg== gSourceV'C BIUSXEXELgi 59322 Styles v Format 1 Font v Size v Av B' 9