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Thread moved from the technical forums, so no Homework Template is shown

I've been struggling with this question and wondered if anyone could help;

For the mechanism shown determine for the angle θ = 45°:

(I) the velocity of the piston relative to the fixed point O (V bo)

(ii) the angular velocity of AB about point A (Wab)

iii) the acceleration of point B relative to A (Aba)

So far I know that Woa = 300 x 2.pi / 60 = 31.42 rad/s^-1

then Voa = r Woa = 50x10^-3 x 31.42 =1.57ms^-1

now I know that I have to use velocity diagrams to calculate Vbo but I'm just confused about how to do it and also how to know what direction each of the velocities are in, this has been stressing me out for a while so any help would be appreciated!

For the mechanism shown determine for the angle θ = 45°:

(I) the velocity of the piston relative to the fixed point O (V bo)

(ii) the angular velocity of AB about point A (Wab)

iii) the acceleration of point B relative to A (Aba)

So far I know that Woa = 300 x 2.pi / 60 = 31.42 rad/s^-1

then Voa = r Woa = 50x10^-3 x 31.42 =1.57ms^-1

now I know that I have to use velocity diagrams to calculate Vbo but I'm just confused about how to do it and also how to know what direction each of the velocities are in, this has been stressing me out for a while so any help would be appreciated!