A rectangular channel has b ft width, with a bottom slope of S=0.0025 and manning coefficient of n=0.035, is carrying a discharge if Qcfs. Determine the normal depth. Determine the critical depth. Determine the specific energy at critical depth. b (ft) 10 15 20 25 ID# 201820251 201810592 201710519 201910364 201810436 201810407 201820313 201910698 201810073 201710542 201910396 201810071 201910049 201810076 201910740 201610022 201910675 201810513 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Q (ft/s) 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700