X’s production function is x = √(LxKx) Y’s production function is y = √(LyKy) Lj is the amount of labor to produce j. Kj is the amount of capital to produce j. j is X or Y. initial endowment of labor is 400. initial endowment of capital is 400. a is MRT when x =10, b is MRT when y = 100. What is a – b?