What type of reactions are these?

Question

Acid-base? Oxidation/Reduction? Precipitation?

1) Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g)

2) Fe (s) + CuSO4 (aq) -> FeSO4 (aq) + Cu (s)

3) Fe (s) + Cu(NO)2 (aq) -> Fe(NO3)2 (aq) + Cu(s)