urgent please

3.1. How much excess pressure (in Pa ) is required to remove water from a porous plug? Assume that all slits in the plug are flat, the menisci of the water have a half-cylindrical shape, and the separation between the slits is 0.1m. 3.2. A friend of yours works in a restaurant, and is complaining about the towels he/she uses to wipe off the counters and the tables. The towels soak up the water fine, but don't do such a good job on beer or wine. What explanation can you give him her for this behavior? Consider the towel as a membrane of interconnected capillary pores