Question 2 (10 points) The generalized Cobb-Douglas Production function is Y = F(K, L) =AK'1L with 1 > a, 5 > 0 Prove the following: a) F(K, L) exhibits constant returns to scale (CR5) lfand only if a l [3 = 1 b) F(K, L) exhibits decreasing returns to scale if and only if oz + 5