Statistics - Percentiles and Quartiles from Cumulative Frequency Curves

The cumulative frequency curve above represents daily wages of \(60\) male adults in factory \(X\). Use the graph to estimate, as accurately as possible,

1. the median daily wage,
2. the interquartile range,
3. the \(30^{\mathrm{th}}\) percentile,
4. the number of male adults whose daily wage is less than or equal to \(\$45\),
5. the fraction of the \(60\) male adults whose daily wage is more than \(\$25\).