A front office receptionist of a given company answers the incoming calls on multi-line telephones. The number of calls successfully attended by the receptionist within each 5-minute period is recorded, resulting in the following frequency distribution:

The front desk has five phone lines, each of which has a waiting system of up to 10 calls. Develop a simulation model to find the probability that some callers will not be attended to within 15 minutes and must make another call. Simulate the calls for the five lines.

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Number of Calls 0 1 2 3 4 5 Probability 0.05 0.10 0.30 0.45 0.07 0.03