92. Sally consumes two goods, X and Y. Her utility function is given by the expression U = 3 . XY. The current market price for X is $10, while the market price for Y is $5.00. Sally's current income is $500. a. Sketch a set of two indifference curves for Sally in her consumption of X and Y. b. Write the expression for Sally's budget constraint. Graph the budget constraint and determine its slope. C. Determine the X, Y combination which maximizes Sally's utility, given her budget constraint. Show her optimum point on a graph. (Partial quantities are possible.) (Note: MUy = 6XY and MUx = 3Y?) d. Calculate the impact on Sally's optimum market basket of an increase in the price of X to 15. What would happen to her utility as a result of the price increase