6. Let MP(L) = aL\" be the marginal product of labor for a rm using a single input (L) to produce output (Q). Assume that Q = 0 if L =0. Find the pro- duction function Q( L). Discuss how the value of b determines whether or nor there is diminishing, increasing, or constant marginal productivity of labor. Use diagrams to explain the relationship between the appropriate conditions that must be imposed on the marginal-product function and the total-product function in order to give rise to diminishing, increasing, or constant marginal productivity of labor