Account for the following

pK_b of aniline is more than that of methylamine

Account for the following:

Ethylamine is soluble in water whereas aniline is not.

Arrange the following in increasing order of boiling point: ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{O}\mathrm{H}, {\left(\mathrm{C}{\mathrm{H}}_3\right)}_2\mathrm{N}\mathrm{H}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$.

Arrange the following amines in the increasing order of their ${\mathrm{pK}}_{\mathrm{b}}$ values

Aniline, N - methylaniline and cyclohexylamine