Number 14 help please

There is no 14. (4 points) The graph of the function w(t) shows the flow rate of water at a reservoir in m3/s. Positive values of w indicate water flowing into the reservoir and negative values of w indicate water flowing out of the reservoir. Choose the answer that gives the best estimate of the net change in water in the reservoir between t = 0 and t = 8. w(t) water flow rate N -2 O 22 m3 O 16 m3 O 10 m3 0 4 m3 O 2 m3