A rectangular channel 2 m wide has a flow of 2 4m³ s at a depth of 1.0 m. Determine whether critical depth occurs at

(a) a section where a bump of height h=0 20 m is installed across the channel bed,

(b) a side wall constriction (with no bumps) reducing the channel width to 1.7 m, and

(c) both the bump and side wall constrictions combined. Neglect head losses of the bump and constriction caused by friction, expansion, and contraction