Inlet time Basin/pipe (min) 5.1 12 5.2 14 5.3 13.2 6.1 14.7 Pipe length (m) 120 200 300 Pipe velocity (m/s) 1.2 0.9 1.5 5.1 5.2 5.3 161 Four subbasins contribute to flow entering pipe 6.1 as shown in the figure above. Given the time data, what time should be used to determine the rainfall for pipe 6.1? Present answer to one decimal place.