Balancing Half-Reactions. Some Help? Check My Work?

Question

Question: In acidic solution, O3 and Mn2+ ion react spontaneously:

O3(g) + Mn2+ + H2O(l) ------> O2(g) + MnO2(s) + 2H+

Write the balanced half-reactions

My Approach:
I got Oxidation: 2H2O + Mn2+ ----> MnO2 + 4H+ + 2e-
Reduction: O3 + H2O ----> 2O2 + 2H+ + 2e-

am i right?

Answer 1

O3 + 2H+ + 2e- -> O2 + H2O

Answer 2

yes. follow the 1st person