Can you please help with these problems?

Water flows in a 10-cm-diameter pipe at a velocity of 0.75m/s. The mass flow rate (in kg/s ) of water in the pipe is ? QUESTION 2 Water flows in a 3.6-cm-diameter pipe at a velocity of 0.75m/s. The volume flow rate (in L/min) of water in the pipe is ? QUESTION 3 Cold water at a rate of 25L/min is mixed with hot water at 44L/min in a continuous manner in a mixing chamber. The rate of water output from the mixing chamber (in kg/s ) is