I need help understanding how to do these problems, 25 points for whoever can do it first

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Can someone me out here and the tell me the greatest common factor

Consider the following estimates from the early 2010s of shares of income to each group. country poorest 40% next 30% richest 30% bolivia 10 25 65 chile 10 20 70 uruguay 20 30 50 1.) using the 4-point curved line drawing tool, plot the lorenz curve for bolivia. properly label your curve. 2.) using the 4-point curved line drawing tool, plot the lorenz curve for uruguay. properly label your curve.