Three machinists, Eric, Juan, and Kate, run a fabrication shop to produce metal components. They stay open from 8:00 a.m. to 5:00 p.m. They perform only milling and drilling activities. On average, it takes 7 minutes with milling, 5 minutes to drill, and 3 minutes for packing the finished goods. When a customer arrives, he or she first checks in with the receptionist (Eric's brother Jason). This takes only 2 minutes. One of the three machinists then takes care of the customer order and performs all three activities - milling, drilling, and packing - consecutively. find the bottleneck