A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution.What is the classwidth?

Number of Social Interactions	Frequencies
35-42	10
43-50	14
51-58	10
59-66	16
67-74	20
75-82	11
83-90	4
91-98	5
99-106	0
107-114	4