* Public `addEmployeeWithName:` (accepts employee name as an input parameter with no return type), which creates a new employee and adds it to the array. The salary is random between 100 and 5000 and is divisible by 10 (e.g. 110, 4670).
* Public `addEmployeeWithName:` (accepts employee name as an input parameter with no return type), which creates a new employee and adds it to the array. The salary is random between 100 and 5000 and is divisible by 10 (e.g. 110, 4670).
* Public `calculateAverageSalary` method, which return the average salary of all employees.
* Public `calculateAverageSalary` method, which return the average salary of all employees.
* Public `employeeWithLowestSalary` method, which returns one employee with the lowest salary in the organization.
* Public `employeeWithLowestSalary` method, which returns one employee with the lowest salary in the organization.
* Public `employeesWithSalary:` method, which accepts one argument of type int - salary - and returns all employees with given salary as an array.
* Public `employeesWithSalary:tolerance:` method, which accepts two arguments of type int - salary and tolerance - and returns all employees with given salary +- tolerance as an array.
Application should create one organization and multiple employees, which are added to the organization. Than all of the methods should be demonstrated. Everything should be logged to `NSLog`.
Application should create one organization and multiple employees, which are added to the organization. Than all of the methods should be demonstrated. Everything should be logged to `NSLog`.
