Emergency room traffic.desert samarittan hospital keeps records of emergency room traffic.those records indicate that the number of patients arriving between 6:00pm and 7:00pm has a poison distribution with parameter =6.9 determine the probability that on a given day,the number of patients who arrive at the emergency room between 6:00pm and 7:00pm will be a.exactly four b.at most two c.between four and 10 inclusive.