Percentage point change between midterm and final grades for students in two sections of a stats course are presented in a split back-to-back stem-and-leaf plot as follows: Section A Section B 4 4 4 2 1 1 1 -1 9 8 7 7 6666 -0 6 7 4 22 1 -0 2 2 3 4 400 0 0 1 3 3 4 95 0 777789 4 4 1 0 0 1 3 444 5 1 5 6 7 7 7 8 8 9 9 Key: 2-0 | 4 means that the student in section A dropped by 2 percentage points between midterm grade and final grade while the student in section B dropped by 4 points. (Percentage point change = final grade - midterm grade) a. How many students in Section A had a worse final grade than midterm? 0 b. How many students in Section B did not experience a grade change? 0 c. How many students in Section B improved by more than 10 percentage points? 0 d. What proportion of students in Section A improved by more than 10 percentage points? e. Calculate the range of percentage point change for Section A. 0 f. Calculate the range of percentage point change for Section B. 0 g. Describe the shape of the Section A distribution in terms of skewness. h. Describe the shape of the Section B distribution in terms of skewness