Please provide Handwritten answer

Use finite approximations to estimate the area under the graph of the function using a) a lower sum with two rectangles of equal width. b) a lower sum with four rectangles of equal width. c) an upper sum with two rectangles of equal width. d) an upper sum with four rectangles of equal width. f(x) = x2 between x = 0 and x = 1. f(x) = 1/x between x = 1 and x = 5