2. Which one of the following is true about a Cobb-Douglas utility function of a. This individual is willing to give up three y to get two x when they

hold the same amount of xand y. b. Marginal utility of x equals 6x-0.6y0.6. c. Marginal utility of y equals 4x-0.4y0.4 . d. Marginal rate of substitution mrs(x,y)=(2y)/(3x).