5. A busy stockbroker answers his phone about aoss of the time. A client, Sally Stockholder called this stockbroker 8 times in April. Assume that each call is independent of each other. a} Let 5 be the number of times that the stockbroker answered Sally's phone calls in April. What are the distribution, parameter{s] and support of 5? b] What is the probability that the stockbroker answered every one of the calls? :1 What is the probability that the stockbroker answered exactly ve of Sally's calls? d] What is the probability that the stockbroker answered at least two of the calls? e] Knowing that the stockbroker answered at leasttwo of Sally's calls, what is the probability that he answered fewer than four of Sally's calls? f} What is the standard deviation of the number of Sally's phone calls that the stockbroker answered? g} Each answered phone call lasts an average of 9.? minutes. How much time does Sally expect to talk to her stockbroker in the given month