1. In 2020, 117 drivers aged between 18 and 24 were asked if they had texted while driving and 15.9% of 102 respondents have admitted to texting while driving. (a) (20 pts) Using 95% level, compute a confidence interval estimating for the true proportion of drivers age between 18 and 24 who have texted while driving (Your work MUST include the definition of the random variable, the distribution, EBP, and the confidence interval.)(b) (20 pts) In the 2019 survey, 31% of respondents (aged 18-24) admitted to texting while driving. Conduct the hypothesis test to determine the percentage of drivers aged between 18 and 24 who have texted while driving has increased in 2020 with 5% level of significance (Your work MUST include Ho, Ha, the definition of the random variable, the distribution, the type of the test (right-tailed, left-tailed, or two-tailed), the test statistic, the p-value, and clearly stated conclusion)