Please help me understand your answer. Thank you.

Part A. Using the diagram below, determine the demand curve for product B across 4 different points. Present your answers in a Table.( Good A = money $240 160 120 Good B O 2 3 4 5 6 7 8 m Part B. Ivan consumes two goods, X and Y. The marginal utility of X and marginal utility of Y are as follows: MUx = Y; MUy = X. The price of X is $27, and the price of Y is $36. Calculate Ivan's MRS in his consumer's equilibrium point (Udmarket