Identify the following types of reactions as precipitation, acid/base neutralization or oxidation reduction

a) hcl(aq) + naoh(aq) = h2o (l) + nacl(aq)

b) pb(no3) (aq) + kcl (aq) = pbbr2 (s) + kno3 (aq)

c) ch4 (g) + o2 (g) = co2 (g) + h2o (g)