dolution

In a chicken farm there is a diet “to gain weight” with a minimum composition of 15 units of a substance A and another 15 of a substance B. Only two classes of compounds are found on the market: type I with a composition of one unit of A and five of B, and type II with a composition of five units of A and one of B. The price of type I is 10 euros and that of type II is 30 euros. He wonders: What quantities of each type must be purchased to meet the needs at a minimum cost?

to. Graphically solve linear programming problems,
b. Interpret your answers.