The grаdes оn а cоllege mаth exam are shоwn below. 79 78 51 81 73 60 51 70 71 87 79 98 88 89 93 74 95 76 92 80 78 97 89 85 75 65 78 54 73 54 If we were to construct a frequency distribution for the data using 5 classes, what is a) the first class, b) the last class, and c) the frequency of the first class? The first class: [statement1] The last class: [statement2] The frequency of the first class: [statement3]