Only answers are fine!! Thanks so much............

Question A7 A profit-maximising monopolist firm facing a downward sloping demand will not select an output where: (a) Demand is elastic. (b) Marginal revenue is falling. (c) Average total cost is rising. (d) Average revenue is equal to marginal cost. (e) Marginal cost is rising. Question A8 Aaron and Bob run mattress shops across the street from each other. At the start of each month, they independently and simultaneous choose prices for their mattresses, which will result in profits as depicted below: Low rice Medium rice Hi_ rice $500 $900 $200 $600 $200 $400 $400, $1000 $700,$200 $100, $800 $200, $300 $400, $200 $800, $700 Aaron Which of the following statements is correct? (a) There are two pure strategy Nash equilibria. (b) Both players have a dominated strategy. (c) There is no pure strategy Nash equilibrium that would result in Aaron having higher profits than Bob. (d) Aaron playing \"low price\" cannot be part of a pure strategy Nash equilibrium. (e) Bob has a dominant strategy of playing \"low price\". Question A9 Adam's Jewelry Store and Brian's Cafe are located next to each other at a local mall. They are considering whether to hire security guards for their business. Their choices and profits are depicted below: Adam's -$200, $0 $100, $50 Jewel Store $400 $100 $600 $0 Prior to making their decisions, Brian claims that he will hire a security guard no matter what Adam does. Which of the following statements is correct? (a) In equilibrium, the socially efficient number of security guards will be hired. (b) In equilibrium, no security guards will be hired. (c) There are two pure strategy equilibria. In each equilibrium exactly one security guard will be hired. (d) Brian's claim is not credible. (e) There is no pure strategy Nash equilibrium in this game. Question A10 Serge Koros, a high net worth individual, is approached one day at his country club by Lenny Waldorf, hedge fund manager. After introducing himself, Lenny tells Serge that he would be willing to manage some of Serge's wealth in exchange for a fixed fee of $1,000,000. Which of the following strategies is likely to have the biggest impact in mitigating moral hazard and improving Lenny's management of Serge's wealth? (a) Serge offers to pay Lenny a lower fee of $500,000. (b) Serge offers to pay Lenny a higher fee of $2,000,000. (c) Instead of a fixed fee, Serge offers to pay Lenny 20% of the prots that Lenny generates from managing his wealth. (d) Serge offers to pay Lenny a xed fee equal to 5% of the wealth he entrusts Lenny to manage. (e) Serge refuses Lenny's offer and asks him for stock tips instead