Problem 3. An intense storm with approximately constant intensity over a duration of 6 hours occurs in a watershed area of 785 km². The watershed outflow is below with discharges, Q, and baseflows, Qb, in m³/s: Hour 0 2 4 6 10 12 14 16 18 20 Q 18 21 Qb 18 2220 28 44 70 118 228 342 413 393 334 25 32 40 47 54 61 68 75 79 Hour 22 24 26 28 30 32 34 36 38 40 P10 270 216 171 138 113 97 84 75 66 59 Qb 77 73 69 66 63 60 57 55 52 49 Hour 42 44 46 48 50 52 54 56 58 60 Q 54 49 46 42 40 38 36 34 33 33 Qb 47 44 42 40 38 37 35 34 33 33 Derive the 6-hour unit hydrograph based on 1 mm of runoff. Again, a spreadsheet would likely make your life easier.