A trapezoidal channel with a ~tom width of 4 m and side slopes of z = 1. 5 is carrying a di scharge of 50 m3/sec at a depth of 3 m. Determine the following:
1. The alternate depth for the same specific energy,
2. The critical depth, and
3. The uniform flow depth for a slope of 0.0004 and n = 0.022.