Well, since the concentration of our solute is greater in this side, then water will tend to move from this side to this side, right? So osmotic pressure basically says well, I need to apply this much pressure on this side of the membrane to stop the movement of that water, to stop osmosis from occurring. So that's what is meant by asthmatic pressure. So now we basically want to use all the given info and use our formula for asthmatic pressure and find our molar mass of polymer. Now, first step is let's write down our formula and let's see which ones we have and which ones we don't. So I we have I just simply won.