(Jury Selection) In the case of Purple v. Pink. It was found that during a period of 2 years in Statopia,

100 people were selected for grand jury duty, and 10% of them have special ability of Water

a.Use the above data to construct a 95% confidence interval estimate of the proportion of grand jury members who had Water ability.

b. Given that among the people eligible for jury duty 58% of them had Water ability, does it appear that the jury selection process was somehow biased against Water ability? Please justify your answer based on the above confidence interval.