1.(10 pts) If the probabilities that ECON 605 class receives 0, 1, 2, 3, 4, or 5 student's absence notes a semester are 0.15, 0.25, 0.36, 0.18, 0.04, and 0.02, respectively. What are the mean and variance of absence notes received in a semester? 2. (10 pts) If the probabilities that an Applied Economics major graduate from the Johns Hopkins University will receive 0, 1, 2, 3, or 4 job offers are 0.07, 0.51, 0.22, 0.11, 0.09, respectively. What are the mean and standard deviation of j ob offers