The data graphed below is 8 years of data from six colleges. The variable is the percent of freshmen that graduate on-time. a) Which college had the highest on-time graduation rate during the years of this study? How do you know? b) On average, which college had the highest on-time graduation rate? How do you know? c) Which college had the most consistent on-time graduation rates overall? Write a sentence precisely describing the variability for this college. d) Which college had the smallest amount of variability relative to its median? Write a sentence precisely describing the variability for this college.