Gorina and Orlov, by mutual agreement, exchanged rooms belonging to them in common apartments and drove into exchanged residential premises. Soon, Gorina sued for the exchange to be invalid, pointing out that she was mistaken about the possibility (given her health status) to live in a dwelling located on the fifth floor in a house that does not have an elevator, underestimated that settled, living mentally ill person. In addition, she demanded reimbursement for relocation and repair of the apartment.
1. Solve the dispute.
2. Will the decision change if Orlov hides from Gorina that a mentally ill person lives in an apartment?

After payment you will be available a link to the solution of this problem in the file of MS Word. It should be noted that the problem solutions put up for sale were successfully handed over in the period 2003-2018 and could be outdated. However, the general algorithm will always remain true.