hi! I think these kind of questions are related to normal distribution and poisson? I got 49.34% for question a) but I 'm not sure if it's correct...please correct me if I'm wrong! Or can I use exponential distribution to solve b? If I calculated all the distributions for different ages separately, should I times or add them together to get the final distribution? if it is possible, a can you also give some explanation for b and c as well? thank you so much!

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