41:18 K133 and Suppose that a firm's production function is given by F(K_.L) =6K2ISL1'J3, in which case the marginal product of capital and labor are given by MPK: 2K 2.53 L213 MPL = respectively. What is the interpretation ofthe marginal rate of substitution at (KL) = (4,4) '? O In order to maintain an ouput level of 24__ then reducmg the amount of capital used by 2 unit would require an additional 1 units of labor. O In order to maintain an ouput level of 6, then reducing the amount of capital used by 2 unit would require an additional 1 units of labor. O In order to maintain an ouput level of 24__ then reducmg the amount of capital used by 1 unit would require an additional 2 units of labor. C In order to maintain an ouput level of 6, then reducing the amount of capital used by 1 unit would require an additional 2 units of labor