this please :)

1. Make-up Exam. In a class of 25 students, 24 of them took an exam in class, and 1 student took a make-up exam the following day. The professor graded the rst batch of 24 exams and found an average score of 74 points with a standard deviation of 8.9 points. The student who took the make-up the following day scored 64 points on the exam. (3.) Does the new student's score increase or decrease the average score? Explain your answer. (b) What is the new average? Show your work. (c) Does the new student's score increase or decrease the stande deviation of the scores? Explain your