Balance the following equations and indicate whether they are combination, decomposition, or combustion reactions: (a) PbCO3(s)

Question:

Balance the following equations and indicate whether they are combination, decomposition, or combustion reactions:
(a) PbCO3(s) → PbO(s) + CO2(g)
(b) C2H4(g) + O2(g) → CO2(g) + H2O(g)
(c) Mg(s) + N2(g) → Mg3N2(s)
(d) C7H8O2(I) + O2(g) → CO2(g) + H2O(g)
(e) Al(s) + Cl2(g) → AlCl3(s)