the u.s. government has decided to build a new off ramp for interstate 5 in california. exxon and shell are both interested in building a gas station near the new off ramp. they can build the gas station near the off ramp for northbound traffic or they could build the gas station near the off ramp for southbound traffic. the profits for each outcome are illustrated in the accompanying payoff table: shell northbound shell southbound exxon northbound exxon receives $60,000 profit shell receives $50,000 profit exxon receives $110,000 profit shell receives $100,000 profit exxon southbound exxon receives $80,000 profit shell receives $120,000 profit exxon receives $50,000 profit shell receives $50,000 profit a. select the nash equilibrium, or equilibria, that occur if exxon and shell make these decisions simultaneously. exxon builds northbound and shell builds northbound. exxon builds southbound and shell builds southbound. exxon builds southbound and shell builds northbound. exxon builds northbound and shell builds southbound. b. use the information in the payoff table to create a game tree for this sequential move game. this part is not graded, but you will need to make the game tree on your own to answer the following questions. c. the nash equilibrium for the sequential move game where exxon moves first is that exxon builds and shell builds now suppose that shell moves first and builds a gas station before exxon. d. the nash equilibrium for the sequential move game where shell moves first is that shell builds and exxon builds