Does anyone know how to do part b?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

What function has a range {yly< 5}? question on picture above^

What is the location of point g, which partitions the directed line segment from d to f into a 5: 4 ratio? –1 0 2 3