Under what conditions do the following production functions exhibit decreasing, constant, or increasing returns to scale? a.

Question:

Under what conditions do the following production functions exhibit decreasing, constant, or increasing returns to scale?
a. q = L + K, a linear production function,
b. q = ALaKb, a general Cobb-Douglas production function,
c. q = L + LaKb + K,
d. q = (aL( + [1 - a]K()d/(, a CES production function?