plz solve it correctly asap

10. A hydropower plant without tail race tunnel is equipped with a tail race canal with length L=300m and width B=10m, exiting into a large reservoir. Water depth y in a canal at t=t1, with the turbine outlet at x=0m and the canal exit at x =300m. Its head loss can be neglected. The figure above shows the water depth y[m] in the canal as a function of position x[m] at some time after a change in turbine discharge Q[m3/s]. The turbine outlet is located at x=0m, and before the change, its discharge was Q=150m3/s a) What kind of change in Q has caused the depth change in the canal? (1p) b) Determine Q after the change. (3p) c) Let t0=0s denote the time when Q started to change and determine t1[s], i.e. the time at which the water depth is as in the figure. (2p)