At the beginning of the year, the mean monthly salary of employees at a company was $5000. In the middle of the year, one of the employee leaves and a new employee joins. Given that there is no change in the salary of the old employees until now, what can be concluded about the mean monthly salary of employees now in comparison to what it was at the beginning? It will not change as the number of employees remains the same. It will not change as there is no change in the salary of the old employees. It will increase only if the salary of the new employee is greater than $5000. It will increase only if the salary of the new employee is greater than that of the employee who left