Question 3 (4 points) SHOW YOUR WORK. For the following reaction equations, assign oxidation numbers to identify the oxidized atom and the reduced atom. (4 marks) a. MnO4 (aq) + H2Seg) + H'(aq) Se(s) ) + + Mn2+ (aq) + H20W b. PbO2(s) + Pb(s) + H2SO4(aq) PbSO4(s) + H2O(1) 3. OX: red: box: red