daily portion diet program based on meat (X) and fish (Y) has a cost of 2X+5Y. The minimum protein required is subject to 2X+4Ya 12, the minimum minerals required is subject to 4X+2Y a 16, and the minimum Iron required is subject to X a 2. Which of the follwoing point coordinates (X, Y) are on the solution border.
a. (3.3, 3.3) b. (2.0) c. (2.4) d. (4.0)