At a certain location a river is 12 meters wide. At this location the depth of the river in meters has been measured at 3 meter intervals.The cross-section is shown below. 3 3 3 3 0.5 2.3 12.9 2.1 13.8 (a) Use Simpson's rule with the five depth measurements to calculate the approximate area of the cross-section. 11 marks) (b) The river flows at 0.4 meters per second Compute the approximate volume of water flowing through the cross-section in 10 seconds