1. World Bank data show that in 1995, the poorest 20% of households accounted for 7.5% of household income in Niger, the next 20% of households accounted for 11.8% of income, the middle 20% accounted for 15.5% of income, the second richest 20% accounted for 21.1% of income, and the top 20% accounted for 44.1% of income. [6] a. What was the cumulative income share of the bottom 60% of households in Niger? [3] b. Draw a Lorenz curve and calculate the Gini coefficient for Niger. [3]