To accurately determine the solubility of N2, Ar, and CH4 gases at the specified pressures, I would need a solubility vs. pressure chart or specific solubility data for each gas. Since I don't have access to that information, I'm unable to provide the exact answers.
If you have a graph or table with the solubility data for these gases at the given pressures, please refer to that to select the correct solubility measurements from the provided choices. Alternatively, if you provide the details from the graph or data you have, I can help you interpret it.