Q. Provided following production function
Q = F(K,L) = K^3/4 L^1/4
a) find an expression for marginal product of labour, MPL, when amount of capital is fixed at 16 units.
b) Suppose capital is fixed at 16 units. If firm can sell its output at a price of $100 per unit and can hire labour at $25 per unit, Explain how many units of labour should firm hire in order to maximize profits?