Apex industry group produces steel combining capital and labor according to the following production function q = f(K, L) = K2/3[1/3 where q is the output while L and K respectively measure the labor and capital utilized in production. (a) Graph the isoquants for q = 5 and for q = 10 respectively. (b) Use calculus to find the expressions for marginal product of capital and labor respectively. (c) Find the expression for the Marginal Rate of Technical Substitution (MRTS). (d) Does this production function exhibit diminishing MRTS? Explain. (c) What do you know about returns to scale of this production process