In an analysis of the results on the entrance exam for a particular academic department at a University, Rania randomly selected 30 students who wrote the exam last year and compiled the data into the following table:

Entrance Exam Results (in %)
52 79 81 66 62 85
96 83 87 65 88 89
78 76 40 77 39 72
82 68 88 70 80 48
87 54 91 74 98 86

Please help Rania analyze the data by completing the following statistical analysis:

a) Construct a grouped frequency distribution table that includes relative frequency (use intervals
of 10%).

b) Construct a fully-labelled histogram using the table you created for a.

c) In a few sentences, describe the shape of the graph you produced and interpret its meaning with respect to student performance on the entrance exam.