hello! I really need help with these problems. I am taking this course online for the first time, as it is my only choice due to Covid-19 and just can not get these right. Please circle answers, I will make sure to leave a review and comment. THANK YOU! :)

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For the function given below, find a formula for the Riemann sum obtained by dividing the interval [0,2] into n equal subintervals and using the right-hand endpoint for each c. Then take a limit of this sum as n- co to calculate the area under the curve over [0,2]. f(x) =5x2 Write a formula for a Riemann sum for the function f(x) = 5x2 over the interval [0,2]. Sn =[ (Type an expression using n as the variable.) The area under the curve over [0,2] is | square unit(s). (Simplify your answer.)For the function given below, find a formula for the Riemann sum obtained by dividing the interval [a, b] into n equal subintervals and using the right-hand endpoint for each c. Then take a limit of this sum as n - co to calculate the area under the curve over [a, b]. f(x) = 7x + x2 over the interval [0,1]. Find a formula for the Riemann sum. Sn = The area under the curve over [0,1] is square units. (Simplify your answer.)Using rectangles whose height is given by the value of the function at the midpoint of the rectangle's base, estimate the area under the graph using first two and then four rectangles. f(x) =x between x = 2 and x = 4 Using two rectangles to estimate, the area under f(x) is approximately (Type an integer or a simplified fraction.) Using four rectangles to estimate, the area under f(x) is approximately (Type an integer or a simplified fraction.)