Select the oxidizing or reducing agent(s) that you would use to carry out the transformation below:
Li, NH₃
i. KMnO₄, H₂O, KOH, heat; ii. H₃O^+
i. O₃, CH₃OH ii. (CH₃)₂S
PCC
RCO₃ HNaBH₄
i. LiAlH₄; ii. H₃O^+
H₂, Lindlar's Catalyst
H₂, Ni