A mass-production plant has eight machines and currently operates one 8-hour shift per day, 5 days per week, 50 weeks per year. Each machine produces the same part at a rate of 24 parts per hour. (a) Determine the annual production capacity of this plant. (b) If the plant were to operate three 8-hour shifts per day, 7 days per week, 52 weeks per year, determine the annual percentage increase in plant capacity?