Physics of the problem

Employer
[no-member:pro]Иван[/no-member:pro]
Project parameters
Type of cooperationOne-time project
SectionEducation and consulting
Prepaymentprepayment is possible
Payment methodsElectronic money
Acceptance of requestsfrom Dec 13, 2018 until Dec 14, 2018
Project description
Please pay attention! Please solve the problems.