Please help and explain

The Quick Change Oil Company has a number of outlets. The numbers of oil changes at the Oak Street outlet in the past 20 days are as follows: 99 57 86 103 108 63 75 59 50 90 46 41 76 82 107 102 82 43 88 107 The data are to be organized into a frequency distribution using 5 classes. b. What class interval would you suggest? (Round the final answer to the nearest whole number.) I: c. What lower limit would you recommend for the first class? I: d. Organize the information into a frequency distribution and determine the relative frequency distribution. (Round the final answers to 2 decimal places.) Relative Units Frequent: frequency to under to under to under to under to under Total e. Comment on the Shape of the distribution. (Enter the intervals in ascending order.) The greatest concentration is in classes |:| up to |:| and |:| up to |:|