Complete and balance the following half-reaction in acidic solution

Question

NO3^-(aq) -> NO(g)

Answer 1

NO₃^- ==> NO ... unbalanced

NO₃^- ==> NO + 2H₂O ... balanced for N and O

NO₃^- + 4H⁺ ==> NO + 2H₂O ... balanced for N, O and H using acid

NO₃^- + 4H⁺ + 3e- ==> NO + 2H₂O ... balanced for N, O, H and charge = balanced half reaction