Can you help me with Question 1 part b and c?

1. The Cobb-Douglas production is given by q = f (k, l) = Aka15 , where 0 0, f, > 0, fkk 0, (b) Derive the marginal RTS; Are the iso-quants convex? (c) under what condition does the production function feature constant return to scale? 2. Suppose that the production of crayons (q) is conducted at two locations and uses only labor as an input. A single firm produces crayons in both locations. The production function in location 1 is given by 91 = 104, and in location 2 by 92 = 50/2. . To produce q crayons with least amount of total labor, how much labor is used in each location