Be sure to show all work, including the formulas you are using when appropriate. 1. (10 pts). Answer the following questions. (i) Which of these exam grades has a better relative position? (a) A grade of 82 on a test with X = 85 and s = 6. (b) A grade of 56 on a test with X = 60 and s = 5.

2. Find the weighted mean for a particular student's scores on three exams if the first one was worth 75 points and the student received a score of 70%, the second was worth 50 points and the student received a score of 80%, and the third one was worth 30 points and the student received a score of 95%?

Can you please show all the work?