Maria makes very elaborate cakes with laminated decoration. You have enough flour mixture to make 48 small or 12 large biscuits. Large ones require 4 times (4x) the amount of flour as small ones. For the decoration frosting, there is enough mix for 32 small biscuits and 16 large biscuits.
X1 = the number of small cupcakes
X2 = the number of large cupcakes

You need twice (2x) the amount for the frosting. The problem requires two restrictions: Small cupcakes sell for $ 6 each and large cupcakes for $ 18 each.
Maximize to. Formulate the problem 1. 

a. Write the constraints and the objective function

b. Solve graphically (You must make the graph)

c. identify the corner points

d. identify which is the best solution