The number of stories in each of a sample of the world's 28 tallest buildings follows. Construct a frequency distribution and a cumulative frequency distribution with 5 classes and the lower class limit of the first class is 48. Input your answers in this order: a) to f) 48 48 49 49 53 53 57 58 62 63 63 64 65 68 68 71 71 72 73 73 75 81 91 96 101 105 110 112 a) What is the class width for a frequency distribution with 5 classes? b) What is the upper class limit of the first class? c) What is the lower class boundary of the second class? d) What is the frequency of the 4th class? e) What is the relative frequency of the fourth class? Express your answer in percentage form with one decimal place, if necessary (add % symbol; leave 1 space between the number and the % symbol) f) What is the midpoint of the first class (Express your answer correct to 1 decimal point)? A/ A