8) Afast food restaurant employs a total of 163 parttime workers. The table below gives the number of hours, h, each part-time employee worked last week. The data is recorded in brackets. Use the midpoints of the brackets to find the population mean and the population standard deviation, respectively, for the number of hours worked by a parttime employee last week at this fast food place. # of hours, h, worked # of employees 57 0 sh