32.g( (z)=z +1, [1, 3,8 rectangles

Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the x- axis over the given interval. (Round your answers to four decimal places.) g(x) = 4x² + 4, [1, 3], 8 rectangles < Area <

For each problem, approximate the area under the curve over the given interval using 3 midpoint rectangles.. please show step by step.      y = x2 / 2 + 1; [-4,2]

THIS QUESTION FROM NUMERICAL METHODS COURSE.