Linear Programming: Graphical Methods for Minimization Problems and Special Situation

I'm completely lost on this question

1. The Charm City Clothiers Inc. makes coats and slacks. The two resources required are wool cloth and labor. The company has 200 square yards of wool and 300 hours of labor available. Each coat requires 5 square yards of wool and 10 hours of labor, whereas each pair of slacks requires 6 square yards of wool and 4 hours of labor. The profit for a coat is $25, and the profit for a pair of slacks is $15. The company wants to determine the number of coats and pairs of slacks to make so that profit will be maximized.

**a.**Formulate a linear programming model for this problem.

**b.**Solve this model by hand using the corner points graphical method.