I need writing a program to calculate the volume flow rate in cubic feet per second of water flowing through a pipe of diameter d in inches and a velocity of v feet per second. The formula for the flow rate is given by
Q = area * velocity
Where area= πd² /4 in square feet.

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This program was written in Dev C++. Please check the comments to understand the meaning of each variable.

Compute the volume of water in cubic feet, flowing through a pipe of diameter d in feet, with a velocity of v feet per second. The formula to compute the volumeflowrate per second is given by:
R = d /2
Area= π . r^2
Volume = area .v

The volumeflowrate q (L^3 T-^1) for laminar flow in a pipe depends on the radius r (L) , the viscosity µ (M L^-1 T-^1) of the fluid, and the pressure drop per unit length dp/dz (M L^-2 T^-2) .
a) Develop a model for the flowrate q as a function of r , µ , and dp/dz.
b) How does q change if the radius is increa

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