The table shows the number of class periods missed over the last 10 courses by two students. Helena 0 8 5 1 6 8 9 829 Juanita 5 6 4 4 4 6 5 5 4 5 Part: 0/2 Part 1 of 2 (a) Find the mean number of classes missed for each student. Round to one decimal place, if necessary. The mean number for missed classes for Helena was The mean number for missed classes for Juanita was 5 Part: 1/2 Part 2 of 2 (b) Without doing the calculations, how do you think the measures of variation compare for the two students?