please show code that is required to solve the problem! thank you, will rate well.

Write a Python program that will calculation the velocity of an incompressible fluid flowing in a circular tube of varying diameter. Upstream and downstream diameters and upstream velocity will be input by the user. The program will calculate the downstream velocity. Find a particular solution, using the following values: INFORMATION Upstream Pipe Diamiter (inch) =3 Downstream Pipe Diamiter (inch) =3 Upstream Velocity (ft/s)=9