Tina can produce any of the following combinations of goods X and Y: (a) 100 X and 0 Y, (b) 50 X and 25 Y, (c) 0 X and 50 Y. David can produce any of the following combinations of X and Y: (a) 50 X and 0 Y, (b) 25 X and 40 Y, and (c) 0 X and 80 Y. Who has the compara- tive advantage in the production of good X? Of good Y? Explain your