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An incompressible viscous fluid flows through a pipe with a flow rate of 1 mL/s. The pipe has a uniform diameter Do and a length Lo. A pressure difference of Po between the ends of the pipe is required to maintain the flow rate. What would be the flow rate if the pressure difference was increased to 3Po and the length was increased to 2Lo? (Do remains the same.) 40.5 mL/s 12 mL/s 1.5 mL/s O 0.667 mL/s O 0.75 mL/s 18 mL/s O 5.33 mL/s O 0.222 mL/s 6 mL/s 162 mL/s 48 mL/s