X 0 1 2 3 4 5 P(x) 0.05 0.25 0.35 0.20 0.10 0.05 (a) Compute the mean - Round the answer to two decimal places. x-2.2 Part 2 of 3 (b) Compute the standard deviation dx- Round your answer to 4 decimal places if necessary. 1.2083 Part: 2/3 Part 3 of 31 (c) If each customer takes 2 minutes to check out, what is the probability that it will take more than 4 minutes for all the customers currently in line to check out? The probability that it will take more than 4 minutes for all the customers currently in line to check out is 0.7