The authors of the textbook "Classical Mechanics" signed a contract with the publisher, without specifying in the contract the date of release of the work and the term of the contract. After a year from the date of the transfer of the manuscript to the publisher, the authors wondered when their manual would be published. Having received no definite answer, they handed over this manual to another publisher, having agreed on the date of publication. They promised to terminate the contract with the first publishing house. When the authors informed the publisher of the termination of the Treaty, the publisher replied that since the term was not stipulated in the contract, this means that the rights to this benefit were transferred to the publisher forever, and the creators of the benefit no longer enjoy any copyright.
Who is right in this dispute and how should it be resolved if the authors file a lawsuit in court? What are the essential terms of copyright agreement? What is the difference between copyright agreements on the transfer of exclusive and non-exclusive rights?
Answer these questions.

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be noted that the problem solutions put up for sale were successfully handed over in the period 2003-2018 and could be outdated.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.