Problem 4., 100gmol/min of a 70mol% naphthalene 30mol% benzene solution at 80C is cooled in a chiller and then sent to a rotary drum filter, which produces two products: a liquid filtrate and a filter cake. The filter cake entrains 1gmol liquid per 8gmol solid. If you want to recover 90% of the naphthalene in the filter cake, to what temperature should the mixture be cooled before filtering