Thirty freshmen living on-campus were asked how many times they skipped breakfast during the previous month. A check of their meal card swipes reveals the following number of skips: 2, 4, 0, 7, 5, 8, 4, 4, 12, 4, 6, 1, 6, 4, 3, 3, 6, 7, 15, 5, 6, 2, 8, 10, 4, 8, 5, 5, 1, 6 

a. Create a grouped frequency table in 2-meal intervals. 

b. Create a grouped frequency table in 5-meal intervals. 

c. Create a grouped frequency table in 10-meal intervals. 

d. Which table gives the clearest picture of the data?