Approximate the area under the graph of the function f(x) = 6x + 8 from 3 to 7 for n = 4 and n = 8 subintervals by using lower and upper sums. (Use symbolic notation and fractions where needed.) (a) By using lower sums s, (rectangles that lie below the graph of f(x)). lower sum S4 = lower sum Sg = (b) By using upper sums S, (rectangles that lie above the graph of f(x)). upper sum S4 =

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Q: Can i get help step by step?

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…