Question 3 For each of the following utility functions, what is the marginal utility of x? What is the marginal utility of y? What is the marginal rate of substitution MRS? What is the equation (y as a function of ) for the indifference curve corresponding to 5 units of utility? What is the equation for the indifference curve corresponding to U = 10? (a) U(x, y) = 10Vx + 7y (b) U(x, y) = 2In(x) + In(2y) (c) U(x, y) = 520310.7