5.1 q2 Part (a)Estimate the area under the graph of f(x) = cos(x) from x = 0 to x= n/2. Use four approximating rectangles and right endpoints. Is your estimate an underestimate or an overestimate?Step 1 of 4Rectangle areas are found by calculating height x width.The width of each rectangle equals Ax and the height of each rectangle is given by the function value at the right-hand side of the rectangle.So we must calculate R₁ =/=1Since we wish to estimate the area over the intervalStep 2 of 4We wish to find R4 = [F(x1) + f(x₂) + f(x3) + f(x4)]().Since X1, X2, X3, X4 represent the right-hand endpoints of the four sub-intervals ofx1 = 0X3 =f(x₁) Ax = [(x₂) + f(x₂)+ f(x3) + f(xq)] Ax, where x₁, x2, X3 X4 represent the right-hand endpoints of four equal sub-intervals of[0].X4=Step 3 of 4Round your answer to four decimal places.Step 1 of 4overestimatexStep 4 of 4Is your estimate an underestimate or an overestimate?underestimateR4 = [cos() + cos(#) + cos(3) + cos(() = 0.7907using 4 rectangles of equal widths, then each rectangle will have width Ax=i=1[0]. then we must have the following.0.7908Part (b)Estimate the area under the graph of f(x) = cos(x) from x = 0 to x = π/2. Use four approximating rectangles and left endpoints. Is your estimate an underestimate or an overestimate?Submit Skip(you cannot come back)We must calculate L4= f(x-1) Ax= [f(xo) + f(x₁) + f(x₂) + f(x3)]AX, where xo, X₁,X₂, X3 represent the left-hand endpoints of four equal sub-intervals ofASince we wish to estimate the area over the interval [0, using 4 rectangles of equal widths, then each rectangle will have width Ax=le 100

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Estimate the area under the graph of f(x) = cos(x) from x = 0 to x = m/2. Use four approximating rectangles and right endpoints. Is your estimate an underestimate or an overestimate? Step 1 of 4 Rectangle areas are found by calculating height x width. The width of each rectangle equals Ax and the height of each rectangle. given by the function value at the right-hand side of the rectangle. So we must calculate R₁ = /W1 F(x, ) Ax= [(x₂) + f(x₂) + f(x3) + f(x₂a)] Ax, where x₁, x2. x3, x4 represent the right-hand endpoints of four equal sub-intervals of [0]. 8 Since we wish to estimate the area over the interval [0] using 4 rectangles of equal widths, then each rectangle will have width 4x =