(6grades) A rectangular channel B (m) wide is to discharge (14,156.1 L/s) of water having a specific energy of (1.37 m): (a) Find the critical depth of this channel for the given flow. (b) Using n=0.013, compute the critical slope of the channel. (c) Compute the minimum specific energy required to maintain a flow of (14,156.1 L/s). (d) Plot the specific energy curve showing the two depths of flow related to E=1.37m.