I just need questions 9 & 10. thank you.

Lorenz Curve and Perfect Distribution Curve 100 indones A Proportion of Total Salaries 20 40 100 Percent of Players 7. Use a Riemann sum with n = 5 and right-hand end-points to estimate the area of region A. 8. In general, what is that largest possible value for the area A? What would be the smallest value? (It is worth noting, for any realistic income distribution, the Lorenz curve will be below the perfect income distribution curve - why?) 9. Write down a definite integral that represents the area A and compute this area. 10. The Gini Index. Denote the area beneath the Lorenz curve and above the x-axis by B. The Gini Index is simply G = A + B Compute the Gini Index for your Lorenz function. What is the range for the Gini index? What does a Gini value of 1 mean? What does a Gini value near 0 mean? For comparison, the Gini index for the LPGA (Ladies Professional Golf Index) was 0.52 in 2012, and the Gini Index for the NFL (National Football League) was 0.55 in 2015. (Gini Index estimates for various countries (World Bank): Brazil .53, Mexico .43, Nigeria .43, United States .41, Canada 34, Germany .31, Sweden .29, Denmark .28)