44 18 28 32 23 13 50 10 27 34 31 16 51 20 23 30 18 28 47 12 41 16 12 14 46 39 26 40 (a) Find the number of classes needed to construct a histogram. Number of classes (b) Find the class length. (Round your answer to the nearest whole number.) Class length (d) Tally the number of values in each class and develop a frequency distribution (Round your midpoint and percent answers to 1 decimal place.) Data Lower Upper Midpoint Width Cumulative Frequency Percent Frequency Percent 12