Robby decided to earn extra money by making and selling brownies and cookies. He had space in his oven to make at most 80 brownies and cookies. Each brownie cost $.10 to make and each cookie cost $.05to make. He had $6 to spend on ingredients. a. Write a system of inequalities to represent the situation. b. Graph the system, choose one point in the feasible region and explain what the point means in terms of the problem. c. If Robby makes a profit of $.25 on each brownie and $.20 on each cookie, how many of each dessert should he make to maximize his profit?