Please help me solve these, I'm stuck!

Question 1: A profit maximizing monopoly can profitably price discriminate between two groups of consumers, A and B. The price elasticity for group A is always 3 while that for B is always 2. Given this information, the price charged to group A should be

A twice the price charged to group B.

B three quarters the price charged to group B.

C one half the price charged to group B.

D one quarter the price charged to group B.

E equal to the price charged to group B.

F None of the above

Question 2: A firm has production technology given by Q = 150K0.7L0.3 + L. The returns to scale are

1. decreasing
2. increasing
3. constant
4. possibly any of the above
5. none of the above