Ready reference works on labor law

Task 3: The plant became necessary to replace equipment, ensuring control and time recording appears on the work and leaving the factory and office workers. It was decided to conduct this work at the weekend (Saturday and Sunday). To this end, the factory hired a team of specialists, including factory workers, with whom the contract was made. It specifically states the following conditions: a) the final result; b) the time (time); c) the total scrip wage group, indicating the specific amount received by each contractor.
After performing the contract work and obtaining the calculation factory workers (members of the group with whom a contract) addressed to the director of the plant with the application. They asked the head of the organization to pay them overtime work (art. 99 of the LC RF), as well as provide other days of rest instead of Saturday and Sunday. His claim professionals motivated by the fact that the group was working on Friday after the end of their shifts, and on Saturday and Sunday they worked only intermittently to receive food and short rest at the work place, which is not more than 4 hours a day. It is this mode of operation has allowed the group to fulfill the terms of the contract.
Justification of whether the requirements of factory workers?
Are the attitudes of members of the group entered into an agreement with the plant, labor?
Task 4. Selivanov is on leave without pay until the end of the calendar year for child care. In May, she went to the personnel department and by presenting a certificate call for exams, requested an educational leave. However, she was refused because she was on vacation.
I am enrolled Head of Human Resources?
How can it be resolved this dispute?
Problem 5. A team of employees consisting of three persons, the tariff level are equal, do repair work, the reward for which the lump-sum according to the task and estimate was 22,500 rubles. According to the data of the time actually spent working each employee worked: Sergeev - 166 hours; Carpenters - 170 hours; Orlov - 160 hours. Determine the earnings of each member of the team.