2.7 Design a diet of bread and milk to get at least 5 units of vitamin A and 4 units of vitamin B daily. The amount of vitamins A and B in 1 kg of each food and the cost per kilogram of the food are given in Table E2.7. Formulate the design optimization problem so that we get at least the basic requirements of vitamins at the minimum cost. TABLE E2.7 Data for the diet problem Vitamin Bread 1 A B Cost/kg, $ 3 2 Milk 2 2 1