(a and b are arbitrary constants.)
a. Find the marginal utility of x and y using calculus. (4 points)
b. Explain whether the marginal utility of x and y is positive or negative and its economic significance. (4 points)
c. Explain whether the marginal utility of x and y is increasing or decreasing. (4 points)
d. What is the amount of x that will maximize utility? (3 points)