4. Water flows in a rectangular channel of width, w. In some cases, the water may suddenly increase in elevation as shown in the figure (from h1 to h2) through a highly disturbed region called a hydraulic jump. Assume the velocity is uniform at stations 1 and 2, and assume the pressures are distributed hydrostatically. hydraulic jump V2 V1 h2 hi Figure for problem 4. (a) Using the conservation of mass and momentum, find the equation (cubic) for the downstream depth, h2, in terms of hi, Vi, and g. (b) Using the Bernoulli equation and whatever other necessary equation(s), find the equation (cubic) for the downstream depth, h2, in terms of h1, Vi, and g. In light of (a) and (b) above, does your answer to this part make sense? Explain. (c) For h1 = 1 m and V1 = 7.6 m/s, find the downstream height, h2, using whichever of the above approaches is the most correct. (Note that there are two valid solutions - explain.) What is the downstream velocity