A professor had students keep track of their social interactions for a week. The number of social Number of Social interactions over the week is shown in the following grouped frequency distribution. How many students Interactions Frequency had at least 60 social interactions for the week? 30-34 35-39 . . . 40-44 45-49 The number of students was 50-54 (Type a whole number.) 55-59 60-64 65-69 70-74 75-79 T