The following information pertains to telephone calls to a motel on a typical Tuesday. Use Table 18.4. Period Morning Afternoon Evening Service Rate Incoming Rate (calls (calls per minute per Number of per minute) operator) Operators 2.1 1.5 2 2.3 1.0 3 1.6 .5 4 Click here for the Excel Data File a. Determine the average time callers wait to have their calls answered for each period and the probability that a caller will have to wait for each period. (Round intermediate calculations and final answers to 3 decimal places.) W Period Morning Afternoon Evening Pw 0.576 0.594 0.597