Please Show All Work

$32\mathrm{.}4-5$ Boiling$-$Point Rise of NaOH Solutions $(30pts$

Determine the boiling point temperature of the solution and boiling$-$point rise for the following cases.

a$.$ A $30\%$NaOH solution boiling in an evaporator at a pressure of $172\mathrm{.}4$kPa.

b$.$ A $60\%$NaOH solution boiling in an evaporator at a pressure of $3\mathrm{.}45$kPa.

c$.$ For both parts a$.$ and b$.$ determine the specific enthalpy of the exit liquid stream from the evaporator.