Question #3: (6 marks) A vendor is selling pies a farmer's market. The vendor finds that she can sell 35 pies cach day at a price of $12.50 cach. Every 50 cent price increase seems to result in 5 fewer sales. The vendor also has a fixed daily cost of $55 (to rent the stall at the market) and each pie costs her $4 to make Find and state the following functions. Show your work. a) the price function, i.e. the equation for the price "p" at which "x" items can be sold. b) the revenue function, i.e. the Revenue "R" of selling *** items c) the profit function, i.e. the Profit "p" of selling "x" items