A firm's production function is initially Q = KL, with MPK = 0.5(L/K) and MPL = 0.5(K/L).

Question:

A firm's production function is initially Q = KL, with MPK = 0.5(√L/√K) and MPL = 0.5(√K/√L). Over time, the production function changes to Q = KL, with MPK = L and MPL = K.
a) Verify that this change represents technological progress.
b) Is this change labor saving, capital saving, or neutral?