The dot plots below show the ages of students belonging to two groups of painting classes: a dot plot shows two divisions labeled group a and group b. the horizontal axis is labeled as age of painting students in years. group a shows 1 dot at 9, 7 dots at 10, 8 dots at 15, 8 dots at 17, and 6 dots at 19. group b shows 6 dots at 10, 5 dots at 14, 6 dots at 18, 5 dots at 25, 4 dots at 28, and 4 dots at 29. based on visual inspection, which group most likely has a lower mean age of painting students? explain your answer using two or three sentences. make sure to use facts to support your answer.