Use Graph paper for this question.
A survey regarding height (in $\mathrm{cm}$ ) of 60 boys belonging to Class 10 of a school was conducted. The following data was recorded:
Taking $2\mathrm{cm}=$ height of $10\mathrm{cm}$ along one axis and $2\mathrm{cm}=10$ boys along the other axis draw an ogive of the above distribution. Use the graph to estimate the following:
(i) the median
(ii) lower Quartile
(iii) if above $158\mathrm{cm}$ is considered as the tall boys of the class. Find the number of boys in the class who are tall.