7. A man has decided to go on a steady diet of steaks and potatoes (plus some liquids and vitamin supplements) for all his meals. He realizes that this isn't

the healthiest diet, so he wants to make sure that he eats the right quantities of the two foods to satisfy some key nutritional requirements. He has obtained the nutritional and cost information shown in the following table,and he wants to determine the number of daily servings (may be fractional)of steak and potatoes that will meet these requirements at a minimum cost.