During the holiday season, the airline "Volair" receives more calls than usual. The airline is forced to extend its hours of service and have two employees to answer and route the night calls to the appropriate departments. One is responsible for answering reservation calls, and the other handles claims calls. At this schedule, reservation calls arrive at a rate of 24 calls per hour while claims calls arrive at a rate of 10 calls per hour. It is assumed that the calls received for reservations are independent of those received for claims.

Gerome, the employee in charge of answering claims calls, left on his 15-minute break. Kevin, who is answering reservation calls, will have to replace him and answer claims calls in addition to reservation calls during this period.

The expected number of calls received in total during this 15-minute period is : a) Between 5 and 6 b) Between 6 and 7 c) Between 7 and 8 d) Between 8 and 9 e) Impossible to calculate

For Kevin, the probability of receiving a total number of calls exactly equal to 10 during the 15 minutes of Gerome's break is : a) Less than 5% b) Between 5% and 10 c) Between 10% and 15 d) Between 15% and 20%. e) More than 20%.