A small warehouse employs a supervisor at $1200 a week, an inventory manager at $700 a week, six stock boys at $400 a week, and four drivers at $500 a week.a) Find the mean and median wage.b) How many employees earn more than the mean wage?c) Which measure of center best describes a typical wageat this company: the mean or the median?d) Which measure of spread would best describe the payroll: the range, the IQR, or the standard deviation? Why?