Can I get detailed explanations and answers? I just want to organize the steps thoroughly

Q4. (Loss Aversion and Trade) A popular idea in economics (based on the so-called Coase Theorem) is that regardless of how goods are allocated in an economy, people will trade their way to an elcient equilibrium. For instance, if there is one good and two agents, then no matter who starts by owning the good, the good will eventually he owned by the person who values it the most. In this problem we revisit this idea in the conted of lowaversion. Suppose there is a free concert that takes place every year, and agent A (reap. agent B) gets $50 (resp. $60) worth of utility from attending that concert in any year. The tickets to the concert are in excess demand every year. In 2018, agent A managed to get the ticket from the ticket oice while agent B did not, and in 2019, B managed to get the ticket from the ticket oice and A did not. (a) From the perspective of standard theory (where the utility of an alter- native is measured in dollar terms and any dollar payments are subtracted from it), what is the range of prices (if there exists any) in 2018 at which A would be willing to sell the ticket and B will be willing to buy it? What is the range in 2019 at which B would be willing to sell the ticket and A would be willing to buy it? For each of these years, say whether trade will take place and say who will end up with the ticket. (1)) Suppose instead that the agents are reference-dependent and 10$ averse, in that the ticket-holder looks forward to attending the concert and incurs a $20 disutility if he does not end up going, while the agent who does not have the ticket expects not to go and experiences no loss if he does not end up going. Redo the analysis in part (a)