The following figure shows a plot between shear stress and velocity gradient for materials/fluids P, Q, R, S, and T.

Which one of the following options is CORRECT?

A 2 m wide rectangular channel is carrying a discharge of 30 m^{3}/s at a bed slope of 1 in 300. Assuming the energy correction factor as 1.1 and acceleration due to gravity as 10 m/s^{2}, the critical depth of flow (in meters) is __________ (rounded off to 2 decimal places).

The number of degrees of freedom for a natural open channel flow with a mobile bed is

A 30 cm diameter well fully penetrates an unconfined aquifer of saturated thickness 20 m with hydraulic conductivity of 10 m/day. Under the steady pumping rate for a long time, the drawdowns in two observation wells located at 10 m and 100 m from the pumping well are 5 m and 1 m, respectively. The corresponding pumping rate (in m³/day) from the well is _____________ (rounded off to 2 decimal places).