Lorenz curve $y=f(x)$ is used to represent a wealth distribution in a nation. The

entire population is plotted along the $x-$axis from poorest to richest, and the height

of the curve on the $y-$axis shows the percentage of total income received by the

proportion of the population given on the $x-$axis. Graph of function $y=x,$ called

the line of perfect equality, represents the population where everyone has the same

income. The area between the graphs of the two functions for $0x100$ shows

the country's income inequality.

The table below gives the percentage of income for selected percentages of people

in a country.

c$)$ Using the obtained curve, approximate the income inequality for the given

country.