Suppose that the production function faced by a 30-weight ball bearing producer is given by Q- 4KL, where MP = 2K2 and MP = 2K L. Do both labor and capital display di- minishing marginal products? Find the marginal rate of technical substitution for this production function. (Hint: The MRTS = MP MP ) Does this production function display a diminishing marginal rate of substitution? b . Suppose that the production function faced by a 40-weight ball bearing producer is given by Q- 4K, where MP = 4L and MP = 4K. Do both labor and capital display diminishing marginal products?