Chem Assignment 1. Assign oxidation numbers to each element in the following chemical equation:(4) Pb (s) + PbO2 (s) + 2 H2SO4 (aq) --> 2 PbSO4 (s) +2 H2O () 2. Assign oxidation numbers to each entity then dentify which entities are oxidized and which are reduced in the following reaction: (2) C2H6 (1) + 3.5 02 (g) --> 2002 (g) + 3H20 (1) 3. Balance each redox reaction in basic solution using the half reaction method. (8) a) 02 + Cr3+ H202 + Cr2072 b) Te + NO3- - Te032. + N204 4. Using the half reaction method balance the following in acidic solution:(4) PbO2 + 12 --> Pb 2+ + 103