14 10 B 32 0 Isoquant for /Output = 60 D Isoquant for E / Output = 40 0 2 3 9 11 Labor a. For an output level of 40 units, calculate the marginal rate of technical substitution between points A and B. b. Also for an output level of 40 units, calculate the marginal rate of technical substitution be- tween points D and E. 5. Given the following graph for two produces