Indicate what type, or types, of reaction each of the following represents:
(a) Ca(s) + Br₂(l) ⟶ CaBr₂(s)
(b) Ca(OH)₂(aq) + 2HBr(aq) ⟶ CaBr₂(aq) + 2H₂O(l)
(c) C₆H₁₂(l) + 9O₂(g) ⟶ 6CO₂(g) + 6H₂O(g)