The average score on the first Literature exam is 77%, with a standard deviation of 6%. 15 students took the exam. The average score on the second exam was 72%, and 21 students took the exam. For the first exam: What percentage of the students would you expect to have scored below 65%?For the first exam: What percentage of the students would you expect to have scored above 83%?What is the weighted average score across both exams?