(A) (1) Consider your need to buy a car. By relying on the rational approach to decision-making, decide to buy a car based on at least two constraints, 5 alternative brands, 4 criteria, proper weights, and grading from 1 (low) to 10 (high.) (2) In a brief essay describe the "positives" and "negatives" of the rational approach to decision-making. (B) Your total utility (U) depends on consuming Q as follows: U = 25Q - 2Q2. Your marginal utility (MU) or personal demand (D) function is P = 25 - 4Q, where P is your reservation price per-unit of Q, that is the price you are willing to pay for each unit of Q. Based on the above U and D information, answer the following: (1) Using this calculator (https://www.desmos.com/calculator) graph together or separately U and D. What is the Q at which you maximize U? (2) The per-unit Market Price for Q is PM = 10. You decide to buy. Compute: how many units of Q you will buy, total utility (TU), total expenditures (TE), and consumer surplus (CS). (3) At PM = 10, for rationing purposes, the Government imposes a quota on Q - 2.5. You decide to buy. Compute: total utility (U), total expenditures (TE), and consumer surplus (CS). (4) For some reason, the Government decides to regulate the market price at PM - 15. Due to various constraints that you experience in your life, you cannot consume less than Q = 4. You decide to buy. Compute: total utility (TU), total expenditures (TE), and consumer surplus (CS)