Find the differential of the function. 
Definitions:
Distribution Of Income
The distribution of income is the way in which a country's total earnings are divided among its population, affecting economic inequality.
Income Distribution
The way in which total income is shared amongst the members of a society or an economy.
Pre-Tax-And Transfer Income
Income before any taxes are deducted or any government assistance or welfare payments are added.
Poverty Rate
The percentage of the population living below the poverty line, where the poverty line is the minimum level of income deemed adequate in a specific country.
Q3: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg" alt="Let .
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