7. (5 points) Below is a probability distribution for the number of girls in 10 births. Number of a) Find the probability of getting exactly 2 girls in 10 births. Girls x P(x) 0 0.001 0.010 2 0.044 3 0.117 0.205 5 0.246 6 0.205 b) Find the probability of getting 2 or fewer girls in 10 births. 0.117 8 0.044 0.010 10 0.001 8. (8 points) 30% of the population has brown eyes. Suppose a group of 20 people is randomly selected and their eye color is recorded as either "brown" or "other". a) For such a group, find the mean number of people who have brown eyes. b) For such a group, find the standard deviation of the number of people who have brown eyes, rounded to the first decimal place. c) In one such group, is 11 an unusually high number of people who have brown eyes? Explain