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1. (8 points) SHOW ALL YOUR WORK!!! The table describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. a. Find the mean and standard deviation WITH ONE OF THE FORMULAS BY HAND for the number of girls in 8 births. Then check your answer with your calculator. Number of girls, x |P(x) 0 0.012 1 0.031 0.115 0.233 0.231 en 0.217 0.122 -J 0.036 0.003 b. What is the probability of having 3 girls? c. What is the probability of having at least 4 girls? d. What is the probability oh having at most 4 girls