The file Utility contains the following data about the cost of electricity (in $) during July 2015 for a random sample of 50 one-bedroom apartments in a large city. 96 171 178 147 102 153 197 127 82 157 185 90 116 172 111 148 213 130 165 141 149 175 123 128 144 168 109 167 95 163 150 154 130 143 187 166 139 149 108 119 183 151 114 135 191 137 129 158 a. Construct a frequency distribution and a percentage distribution that have class intervals with the upper class boundaries $99, $119, and so on. b. Construct a cumulative percentage distribution. c. Around what amount does the monthly electricity cost seem to be concentrated?

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