I need the answer for b and c with an explanation, please

The table below shows the share of income received by each fifth of income earners, from lowest to highest, in three hypothetical countries. .- (lowest) (highest) country 1.i_ country 2 --I_ a. Calculate the cumulative distribution of income among the five groups of income earners in each country. Enteryour responses below rounded to a whole number, m I_II-EII_II-9II_0I I_II_I I_II_II_II_II_I b. Draw a graph showing the three countries' Lorenz curves. Plot 6 points for each curve, including the origin point (0, 0), for a total of18 points plotted below. To manually enter plotting coordinates click on a line segment between 2 points then click on the widget icon to bring up the curve properties box. c. (Click to select) has the most equal distribution of income, (Click to select) has the least equal distribution, and (Click to select) is in the middle