(c) A trapezoidal channel with a 5m wide bed and top width, 8m caries a flow with discharge of 80 m's". Find: 2 1 Figure Q1(b) (i) Flow depth, y. (1 marks) (i) Flow classification through this channel. (2 marks) (iii) Specific energy of the flow. (1 marks) (iv) The angle of the bed channel if the height from the downstream is 2m above sea level and 7m at the upstream, with horizontal distance between the two points is 1km. (2 marks) (v) Using the answer from above, find type of lining used for the channel. (3 marks)