Exercises: Waiting Lines i Saved Help Save & Exit Submit Check my work 27 Problem 18-4 The following information pertains to telephone calls to a motel switchboard on a typical Tuesday. Use Table 1. points Number of Operators Period Morning Afternoon Evening Service Rate (calls per minute per operator) 1.5 1.0 .5 Incoming Rate (calls per minute) 2.1 2.3 1.4 WN eBook Print 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.) References Period Morning Afternoon Evening b. Determine the maximum line length for a probability of 95 percent. (Round your intermediate calculations to 3 decimal places and round up your final answers to the next whole number.) Lmax Period Morning Afternoon Evening