7) Set up the linear programming problem. Do not solve. A baker has 60 units of flour, 132 units of sugar, and 102 units of raisins. A loaf of raisin bread requires 1 unit of flour, 1 unit of sugar, and 2 units of raisins, while a raisin cake needs 2, 4, and 1 units, respectively. If raisin bread sells for $3 a loaf and a raisin cake for $4, how many of each should be baked so that the income is maximized? What is the maximum gross income? Let x1 represent the number of raisin bread loaves, and x2 represent the number of raisin cakes. gross