You'd better type. If you write, please do it clearly.
Suppose f(x1, x2) = x1^(1/3) * x2^(1/2) * w1 * w2 = 1. For profit maximization, what is the long-run cost function?
A. Cy = (2/3 - 1/2)y^(6/5) + (3/2)^(1/3)y^(6/5)
B. Cy = (2/3 - 1/2)y^(1/5) + (3/2 - 1/3)y^(6/5)
C. Cy = (3/2)^(1/2)y^(6/5) + (2/3)^(1/3)y^(1/5)
D. Cy = (3/2 - 1/2)y^(6/5) + (2/3 - 1/3)y^(1/5)