despite the reduction in the number of passengers, the call center of an airline still receives a high volume of calls due to more frequent flight cancellations and travel restrictions. the call center receives an average of 6 calls in a 15-minute interval.

1. what is the probability that there are no calls in any 15 minutes interval (answer 4 decimal places)

2. what is the probability that they receive between 6 to 10 calls (inclusive) in any 15 minutes interval (answer 4 decimal places)

3. what is the probability that there are at least 30 calls in any one-hour interval (answer 4 decimal places)