a. Calculate the cost of increasing production of good X from 0 to 10 units, as measured in the amount of good Y that would need to be sacrificed. b. Calculate the cost of increasing production of good X from 10 to 20 units, as measured in the amount of good Y that would need to be sacrificed. c. Calculate the cost of increasing production of good X from 20 to 30 units, as measured in the amount of good Y that would need to be sacrificed. d. What happens to the opportunity cost as the production of good X increases