Hello! I am confused with this question. Could you please help me? Thank you!

6. (18 pts) An insurance company has determined that each week an average of nine claims are led in their Atlanta branch. Assume the probability of receiving a claim is the same and independent for any time intervals. What is the probability that during the next week a. exactly seven claims will be led? b. no claims will be led? at least three claims will be led? 9.0 What is the probability that during the next 2 weeks the company will receive less than 4 claims