a chemical company produces four types of products: A,B,C,D each requires labor to produce and uses some combination of chlorine sulfuric acid and sodium hydroxide in the process the production process can also produce these chemicals as a by-product rather than just consuming them the chemical mixture and labor required for the production of the three products are listed int he following table, along with the availability per day the market values for one barrel of A,B,C,and D are $50, $30, $80, $30 respectively determine the number of barrels of each to produce to maximize profit using thee different approaches

A. as a continuous linear programming problem with rounding

B. as an integer linear programming problem

C. exhaustive search