POSKY 737-800 V-Speeds?

Hi there

What are the V-Speeds for the POSKY 737-800 (or any 737-800, I'm sure there the same).

I am looking for V1, VR, V2, VSO (or whatever the stall speed is called) VRef and whatever other V-Speeds I need

I know that there will not be definite figures for this as it depends on weight, flaps etc but if I could get an idea

Also if I would like accurate figures how do I figure out V-speeds for myself??

Thanks