Solve this physyco chemistry Please

Since the vapor pressure change of water at $100$ oc temperature is $26\mathrm{.}97$ mmHg$/$k and the molar volume in liquid and vapor states is given as $0\mathrm{.}01878$ L$/$mol and $30\mathrm{.}199$ L$/$mol$,$ respectively, find the entropy change of water in cal$/$mol$\backslash$times k$.$At what temperature does water shift at an altitude of $700$ mmHg$?$