Oblique Collisions Question

I have attached the question. I have used simultaneous equations to work out equations for velocity after impact but I have no idea where to go from there or even what the diagram looks like when it mentions a deflection

Any help is greatly appreciated

The collision will cause A to be deflected by theta, so that would be the angle it makes with the direction of motion prior to the collision. If youve worked out the velocity post collision, then that should give you tan(theta) as you know tan(alpha)?

I have the velocity post collision but no idea how to get tan(theta) in the form the question requires