Match each of the following energy changes with one of the processes given: ionization energy, electron affinity,

Question:

Match each of the following energy changes with one of the processes given: ionization energy, electron affinity, bond enthalpy, and standard enthalpy of formation.
(a) F(g) + e - → F- (g)
(b) F2(g) → 2F(g)
(c) Na(g) → Na+(g) + e-
(d) Na(s) + 1/2 F2(g) → NaF(s)