The weight of 50 students in pounds are given below: 82 95 120 174 179 176 159 91 85 175 88 160 97 133 159 176 151 115 105 172 170 128 112 101 123 117 93 117 99 90 113 119 129 134 178 105 147 107 155 157 98 117 95 135 175 97 160 168 144 175 If the data are arranged in the form of a frequency distribution with class intervals as 81-100, 101-120, 121-140, 141-160 and 161-180, then the frequencies for these 5 class intervals are