3. A final assembly process to produce an ergonomic golf club, requires three operator-attended operations whose normal times are 0.25, 0.75 and 0.85 hrs., respectively. Each operator works, including overtime, no more than 2200 hrs. per year. If the shift allowance is 10%, how many people qualified for this final assembly process must be on the payroll in order to produce 10,000 golf clubs per year? (10 points)