For the following data, construct a frequency distribution with six classes. (Solve this question on paper and show all your calculations)

57 23 35 18 35
26 51 47 29 21
46 43 29 23 39
29 41 19 36 28
31 42 52 29 18
28 46 33 28 20

a) Find the Class intervals, Frequency of each class, Class midpoint, Relative frequency, and the cumulative frequency