1. Complete the table below and find the variance and standard deviation of the following probability distribution. X P(X) P(X) x2 P(X) 17 0.2 18 0.3 19 0.2 20 21 0.1 0.2 2. Find the variance and the standard deviation of the probability distribution of the random variable X which can take only the values 2, 3, 5, 7, 11, and 13, given that P(2)= 0.15,P(3)= 0.25,P(5)= 0.15,P(7)= 0.10,P(11) = 0.30, and P(13) = 0.05.