Hello can I please have help with this question? Thank you

1. According to the Agency for Healthcare Research and Quality, there were 409, 706 hospital visits for asthma related illnesses in a recent year. The age distribution was as follows. Age Range Number Less than 1 year 7, 866 1-17 103, 040 18-44 79, 659 45-64 121, 728 65-84 80, 649 85 and up 16, 764 Total 409, 706 a. What is the probability that an asthma patient is between 45-64 years old? b. What is the probability that an asthma patient is younger than 18? c. Using a cutoff of 0.05, is it unusual for an asthma patient to be younger than 1 year old