The file Utility contains the following data about the cost of electricity ( in $) during July 2014 for a random sample of 50 one- bedroom apartments in a large city.

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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96 171 202 178 147 102 153 197 127 82 157 85 90 116 172 148 213 130 165 4 149 206 175 123 128 144 168 109 67 95 163 150 154 130 43 187 166 139 149 108 119 183 151 114 135 19 137 129 158