arithmetic and weighted average

A call center has four categories of employees, each paid a particular wage. Managers are paid $27 an hour, clerks $18 an hour, technicians $22 an hour, and administrative assistants $16 an hour. The call center has 3 managers, 22 clerks, 4 technicians and 6 administrative assistants, Calculate the average pay per employee based on: a. What is the simple arithmetic average? Round off to nearest cent. [3 marks] b. What is the weighted average? Round off to nearest cent. [3 marks]