The table shows the distribution of marks obtained by students in an examination. 

Marks (%)	0 - 9	10 - 19	20 -  29	30 - 39	40 - 49	50 - 59	60 - 69	70 - 79	80 - 89	90 - 99
Frequency	7	11	17	20	29	34	30	25	21	6

 

(a) Construct a cumulative frequency table for the distribution.

(b) Draw the cumulative frequency curve for the distribution.

(c) Using the curve, find correct to one decimal place, the:

(i) median mark;

(ii) lowest mark for the distinction if 5% of the students passed with distinction