In а stоre, the number оf pаtients аrriving in оne-hour window to an emergency clinic follows a Poisson distribution with rate 25/hour. With 20% probability, each patient requires an operating room for an emergency surgery. Compute the expected number of operating rooms required per hour at this emergency clinic and its variance. Show your work on your scratch paper. Expected total required operating rooms = [mean] Variance of total required operating rooms = [var]