Hi I need help with questions 1-3 please

9:06 D a webassign.net For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer. Assignment Scoring Your best submission for each question part is used for your score. 1. [-/1 Points] DETAILS TANAPMATH7 11.3.002.NVA MY NOTES ASK YOUR TEACHER Find an approximation of the area of the region R under the graph of / by computing the Riemann sum of f corresponding to the partition of the interval into the subintervals shown in the accompanying figure. Use the midpoints of the su tervals as the representative points. square units 8.0 8.5 6.0 4.5 4.0 3.0 2.5 2.0 y=f(x) Need Help? Watch It 2. [-/1 Points] DETAILS TANAPMATH7 11.3.003.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Let ((x) = 2x. (a) Sketch the region R under the graph of f on the interval [0,4]. O O O Find its exact area using geometry. square units (b) Use a Riemann sum with four subintervals of equal length (n = 4) to approximate the area of R. Choose the representative points to be the left endpoints of the subintervals. square units (c) Repeat part (b) with eight subintervals of equal length (n = 8). square units d) Compare the approximations obtained in parts (b) and (c) with the exact area found in part (a). Do the pproximations improve with larger n? Yes No Need Help? Watch It 3. [-/1 Points] DETAILS TANAPMATH7 11.3.004.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Let ((x) = 2x. (a) Sketch the region R under the graph of fon the interval [0,2]. O O O O Find its exact area using geometry. square units (b) Use a Riemann sum with four subintervals of equal length (n = 4) to approximate the area of R. Choose the representative pointsof tive points to be the right endpoints of the subintervals. square units (c) Repeat part (b) with eight subintervals of equal length (n = 8). square units (d) Compare the approximations obtained in parts (b) and (c) with the exact area found in part (a). Do the approximations improve with larger n? Yes NO 4