Showing the given excel file on inequality

## New names:
## * `` -> ...4
## * `` -> ...5
## * `` -> ...6
## * `` -> ...7

Adding Palma Ratio as a variable and showing the data frame

Taking 76 countries’GDP and income level at year 2017.

Merging two data frame by country

Showing the top and bottom countries based on Palma Ratio

Classifying the countries based on Income Level

## 
##         High income          Low income Lower middle income Upper middle income 
##                  32                   4                  13                  27

Showing mean of the Palma Ratio based on income level

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So after analyzing the data ,we can see that the mean of the Palma Ratio is low for high income countries and high for lower income countries.

Richer countries have on an average less value in the Palma Ratio than the poorer countries.