Find a Doctor, is a small startup that helps people find a physician that best meets their needs (location, insurance accepted, etc.) During a "slow" time for them, they have 9 staff members taking calls from customers. On average, one call arrives every 7 minutes. On average, each staff member spends 22 minutes with each customer. What is the utilization rate of the staff members? (choose the answer closest to your calculations) 35% 45% 30% 40%