a$)$ Please write down Raoult's and Dalton's laws in their generally valid form.

b$)$ Please sketch the boiling point and condensation curves into a completely marked $($T$-$x$,$y$)$ diagram for a binary mixture having a maximum azeotrope $($boiling point maximum$)$ in case of constant pressure. Label both curves. Additionally, sketch the corresponding and consistent equilibrium diagram. Define all parameters used.

$6$ marks