Do the following functions exhibit increasing, con- stant, or decreasing returns to scale? What happens to the marginal product of each individual factor as that factor is increased and the other factor held constant?
a. q = 3L + 2K
b. q = (2L + 2K)1/2
c. q = 3LK2
d. q = L1/2K1/2
e. q = 4L1/2 + 4K