Numerical Simulation Streamfunction

[HeerBeer]

So I'm given the task of calculating the streamfunction with given angles of the flow on different carthesian coordinates (as shown in the picture).

The translation of exercise one: use sinks and sources to calculate the streamfunction. They have to be located between (-3,0) and (3,0).

The translation of exercise two: calculate the rotation on point (5,5).

The translation of exercise three: do the same as in exercise one but with vortex and calculate the rotation again in (5,5).

Does somebody know how to do this? Thanks in advance.