The table below gives the ages, to the nearest 5 years of 50 people.

Age in years	10	15	20	25	30
No of people	8	19	10	7	6

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

(b) Draw a cumulative frequency curve (Ogive)

(c) From your Ogive, find the : (i) median age ; (ii) number of people who are at most 15 years of age ; (iii) number of people who are between 20 and 25 years of age.