Find the mean of the random variable

Find u if u = _ [x . P(x)]. Then, find o if 62 = _ [x2 . P(x)] -H2. X 0 1 2 3 4 5 P(x) 0.0845 0.2700 0.3452 0.2207 0.0706 0.0090 (Simplify your answer. Round to four decimal places as needed.) O = (Simplify your answer. Round to four decimal places as needed.)