The IQ scores of 50 students are given below.
111 111 108 85 110 114 101 115 107 85
108 115 117 112 106 91 110 98 90 98
107 85 119 112 94 112 111 90 92 92
105 93 99 88 91 87 86 93 106 119
110 90 97 116 119 110 87 89 103 112
(a) Construct a grouped frequency distribution for the data. Use 85-89 for the first class and use the same width for each subsequent class.