Please help me solve this with steps.

3.- Arm uses K and L to produce some output. q. The production function is f(L, K) = (L'2 + 10K '2) 'i. The price of K is r = 200, and the price of L is w = 20. Given these input prices, obtain the (conditional factor demand functions and then the) cost function C(q) for this rm. (Instead of applying shorthand formulas, I would write down the cost minimization problem and would look at its constraint for a couple of seconds, as this may simplify the derivations