Presidents: Following are the ages at deaths for all U.S presidents. Construct a frequency distribution for the data, using 5 classes, and a lower limit of 45 for first class. 67 83 90 73 85 68 78 80 53 65 71 79 56 77 64 74 66 49 63 57 70 67 58 71 60 57 67 72 60 63 46 90 78 88 64 81 93 93 Cumulative Cumulative Relative Class limits Frequency Midpoint Relative Frequency Frequency frequency 45-50 2 50-55 O 55-60 5 60-65 6 65-70 6