Помогите пожалуйста:(
Осуществите превращения:
1)пропанол-1  (H2SO4конц.,
t)
→ X1  (Br2) → X2 → пропин  (H2O, Hg2+) → X3  (H2, kat) → X4
2)
C2H4 → C2H4Cl2  (KOHспирт.,t) → X1 
(t,
Cакт.)
→ C6H6  (CH3Cl, AlCl3) → X2 (KMnO4,
H2SO4)
      → C6H5COOH
3)
CaC2  (H2O) → X1  (H2O, Hg2+) → X2 → CH3COOH  (Ba(OH)2) → X3  (t) → CH3-CO-CH3
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