Page KK 2 of 2 3. A national survey of bank customers finds that 38% are younger than 50. Of those younger than 50, 7/9 conduct their business online. Of those older than 50, only 1 of 12 banks online. a) Draw a tree diagram for this situation. his b) What is the probability that a customer is under 50 and banks online? c) What is the probability that a customer is over 50 and banks online? d) What is that probability that a random customer banks online? e) What is the probability that a customer is over 50 given that they bank online