Let represent the units of labor and the capital invested in a manufacturing process. When 135,540 units are produced, the relationship between labor and capital can be modeled by 100 0.75 0.25 = 135,540. a. Find the rate of change of capital with respect to units of labor when labor is 1500 units and the capital invested is 1000 units. Write your answer with correct units. b. As more labor is used, what happens to the available capital? Write your answer in a complete sentence. c. As more capital is used, what happens to the available labor? Write your answer in a complete sentence