The randomly selected 60 shoppers have rated a new bottle design for a popular soft drink. The data are given below. 2? 38 2Q 38 35 28 28 33 23 33 3? 35 21 21 28 48 35 29 3Q 34 38 33 35 3? 28 21 23 24 3? 24 2? 23 4B 35 2? 28 3E 39 3E 34 39 25 4B 3? 28 34 2? 28 22 31 31 33 2B 35 3? 28 22 24 38 23 | {3) Find the number of classes that should be used to construct a frequency distribution and histogram for the bottle design ratings {From Table 2.5]. _ {b} Find the class length. {Round your answer to the next whole number.} _ {d} Tally the number of ratings in each class and develop a frequency distribution. {Round your midpoint values to 1 decimal place.]