One hundred students who live on campus were asked: during the past week, how many times did you eat dinner off campus? The frequency represents the number of students who ate dinner off-campus x times. From this distribution, we can see that 1 student did not off-campus at all. Frequency:0,1,2,3,4,5,6,7 and number of students for each frequency: 1,19,3,15,20,14,16,12. Convert the frequency distribution into a probability distribution and graph the probability distribution using a relative frequency histogram.