The table below shows the mark distribution of candidates in an aptitude test for selection into the public service.

Marks (in %)	Freq
44 - 46	2
47 - 49	5
50 - 52	11
53 - 55	20
56 - 61	42
62 - 64	46
65 - 67	36
68 - 70	9
71 - 73	3

(a) Make a cumulative frequency for the distribution

(b) Draw the cumulative frequency curve.

(c) From your graph, estimate the median mark.

(d) The cut-off mark was 63%. What percentage of the candidates was selected?