<image>A tech development company currently has 50 employees. The monthly salary situation for all employees is shown in the table:

Based on the above content, answer the following questions:
(1) How many senior technicians does the company have?
(2) What is the median and mode of the monthly salaries of all employees?
(3) After excluding the salaries of four managers, calculate the average monthly salary of the remaining ordinary employees. (Keep four significant figures)