Question 1117210
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I think that in our days, in the century of computers and the Internet, you will not find many enthusiasts who will make such calculations manually.


Besides of it, I consider such a job as useless spending of the human/people intellectual resources.


It is much better to spend these efforts and this time for something more reasonable.


In our days it is not difficult to find online solvers in the Internet, which will do all this work for you with detailed 
demonstration of all intermediate calculations at no charge.


One of such free of charge online solvers you can find at this link


https://www.emathhelp.net/calculators/calculus-2/riemann-sum-calculator/