The minimum daily requirements from the liquid portion of a diet are 300 calories, 36 units of vitamin a, and 90 units of vitamin c. a cup of dietary drink x costs $0.12 and provides 60 calories, 12 units of vitamin a, and 10 units of vitamin c. a cup of dietary drink y costs $0.15 and provides 60 calories, 6 units of vitamin a, and 30 units of vitamin c. how many cups of drink should be consumed each day to minimize cost and still meet the daily requirements? ( use a graph with the answer if possible)