7) (14 pts) A chocolate truffle maker plans to make truffles for a street fair. She makes two kinds of truffles: a dark one that she sells for $1 a piece, and a lighter chocolate truffle that she sells for 80 cents a piece. She needs 2 teaspoons of heavy whipping cream and 10 grams of chocolate to make a dark truffle and 4 teaspoons of heavy whipping cream and 5 grams of chocolate to make a light truffle. She has a total of 1600 teaspoons of heavy whipping cream and 5000 grams of chocolate that she can use for these truffles. (a) Find the inequalities for the constraints. Then, graph the feasible region and label the corner points. (Make sure to define what your variables represent.) (b) How many truffles of each kind should she make to maximize revenue and what is that maximum revenue