Determine the location of the stagnation point for a potential flow field which is the combination of a uniform flow field with a velocity of V and a vortex flow field with a strength of Ω.

a) Stagnation point at (V, Ω)
b) Stagnation point at (Ω, V)
c) Stagnation point depends on flow rate
d) Stagnation point cannot be determined