Estimate the area between the graph of the function f and the interval a,b. Use anapproximation scheme with n rectangles similar to our treatment off(x)=x2in this section.If your calculating utility will perform automatic summations, estimate the specified areausing n=10,50, and 100 rectangles. Otherwise, estimate this area using n=(2),5, and 10rectangles.4.21.f(x)=x2;[a,b]=[0,1]f(x)=1x+1;[a,b]=[0,1]f(x)=1x;[a,b]=[1,2]f(x)=1-x22;[a,b]=[0,1]f(x)=1-x22;[a,b]=[-1,1]solve 2.5.7.8as per attached solution done for question 1in red colorUsing n=2 & 5