Write a function that models the difference between the female U.S. population and the male U.S. population for the years shown in the bar graph.With a careful inspection, a linear model is suited to the tops of the bars of male population as millions and x is the year after 1985Similarly, the female population is modelled by million.The difference is the male population is more than the female population given by million per year b. Use the function from part (a) to find how many more women than men there were in the U.S. population in 2005.Observe that 2005 is 20 years away from 1985 and so, substitute 20 in place of x in the difference equation, we get Interpreting this result carefully, we can say that 4.5 million female population is more than male population in the year 2005. c. Does the result in part (b) overestimate or underestimate the actual difference between the female and male population in 2005 shown by the bar graph? By how much?The result in (b) is 4.5 million female more than male in the year 2005 while from the graph, the difference of female over male is 151 – 14 = 4 millionSo,