Given: а) (3 pts) Sketch the grаph оf f(x) fоr the entire dоmаin in the upload submission. b) (5 points) Estimate the area under the curve of f(x) from x=1 to x=4 using six rectangles with right endpoints. Sketch the rectangles used and show clearly your computations in your written upload. Use fractions and not decimals in your computations. c) (2 pts) Input your answer in the provided space below. The estimated area under the curve from x=1 to x=4 is ______________