solve using 2-phase method

1. [10 marks] Solve the following problem by hand using the Simplex tableau. You wish to create a recipe for brake fluid which is sold in 100ml containers. The resulting fluid should have at least 20% carbon, and no more than 50% of pentane. You create the fluid by mixing together two ingredients: a mixture sourced from Saskatchewan which is 60% carbon and 40% pentane, by volume and a mixture from Alberta which is 10% carbon and 90% pentane, by volume. The Saskatchewan mixture costs 4c/ml and the Alberta mixture costs 3c/ml. How much of each ingredient should you use to create the brake fluid at minimum total cost