Problem (14 points) There is a repetitive operation where the operator is working at 85% of the corresponding learning curve. It took the operator 48.7 minutes to complete the first unit. For the 4th and 8th units: 1. calculate the cumulative average time (6 pts) 2. calculate the labor cost per unit if the operator gets paid at $10.00 per hour (4 pts) 3. briefly explain why the labor costs per unit are different. (4 pts)