The following salts are given: silver nitrate, magnesium carbonate, iron sulfide (2), potassium sulfite

The following salts are given: silver nitrate, magnesium carbonate, iron sulfide (2), potassium sulfite, lead nitrate (2). Which of them will interact with hydrochloric acid to form: a) a precipitate; b) gas? Write down the reaction equations.

Reactions with the formation of a precipitate (see table of solubility):
1) AgNO3 + HCl = AgCl + HNO3 (silver chloride precipitate);
2) Pb (NO3) 2 + 2 HCl = Pb (NO3) 2 + 2 HNO3 (lead nitrate is slightly soluble, that is, there will be a precipitate).
Reactions with gas evolution (these are salts of acids weaker than hydrochloric acid):
1) MgCO3 + 2 HCl = MgCl2 + H2O + CO2 (carbon dioxide);
2) FeS + 2 HCl = FeCl2 + H2S (hydrogen sulfide gas);
3) K2SO3 + 2 HCl = 2 KCl + H2O + SO2 (sulfur dioxide).