First off, to make things a little easier, the melting point has the same value as the freezing point.
Second, these are all colligative properties, meaning they are affected by the number of particles in solution rather than the identity of the particles, so when asked which compound has the highest b.p. in solution, you look for the compound that dissociates into the most particles (since boiling point is elevated when you increase the number of particles). Freezing point/melting point is the opposite, and decreases with an increased number of particles