what is the objective function? what is it subject to? optimum fucntion? and what are the corner points?

Doug Turner Food Processors wishes to introduce a new brand of dog biscuits composed of chicken and liver flavored biscuits that meet certain nutritional requirements. The liver flavored biscuits contain 1 unit of nutrient A and 2 units of nutrient B; the chicken flavored biscuits contain 1 unit of nutrient A and 4 units of nutrient B. According to federal requirements, there must be at least 40 units of nutrient A and 60 units of nutrient B in a package of the new mix. In addition, the company has decided that there can be no more than 18 liver flavored biscuits in a package. It costs 1 to make 1 liver flavored biscuit and 24 to make 1 chicken flavored. Doug wants to determine the optimal product mix for a package of the biscuits to minimize the firm's cost. The L.P. Model for Doug to determine the optimal solution is: Variables: X = number of liver flavored biscuit in a package Y = number of chicken flavored biscuit in a package a) Objective Function: Minimize Z