Winding Brook farms plans to incorporate two types of ingredients to make a mix of low cost feed for the animals at his farm. Ingredients A costs $9.00 and contains 40 units of proteins, 20 units of minerals and 10 units of vitamins. Ingredient B costs $15.75 and contains 30 units of proteins, 20 units of minerals and 30 units of vitamins. Daily minimum requirements consist of 140 units of proteins, 85 units of minerals and 60 units of vitamins. a. Based on the lowest possible cost, how much of ingredient A and B should be part of the mix. [Select] b. What is the overall cost? [Select] c. Was there any unused resources? [Select] If so, which constraint and by how much? [Select] d. If the daily minimum requirement of vitamins was now increased to at least 75 units what impact would it have on the overall cost? [Select] V e. Based on the change that took place in letter d. (at least 75 units of the vitamin compound), if Winding Brook was able to purchase ingredient B through another supplier and it was reduced to $13.75. what is the overall cost?