Please answer the questions

The following chart shows the distribution of exam grades for a sample of 113 students in a statistics course. The class intervals are 20 to under 30, 30 to under 40, and so on. Class frequencies are displayed on the bars. 20 30 40 50 60 70 80 90 100 Score on Exam q a. What is the width of each class interval? 0\" b. What is the midpoint of the median class? C] c. What is the lower limit of the modal class? [:] d. How many students scored less than 70? 0' e. What percent of the students scored 70 or higher? Round to one decimal place. C] % f. What is the frequency of the class containing the 14th percentile, P14? [:J