1. The average score on the first Physics exam is 64%, with a standard deviation of 14%. 15 students took the exam. The average score on the second exam was 70%, and 21 students took the exam. a. For the first exam: What percentage of the students would you expect to have scored below 36%? b. For the first exam: What percentage of the students would you expect to have scored above 78%? c. What is the weighted average score across both exams