Given the following half-cell reactions: 1. 2 + 2 + 2 2. 2 2 4 + 2() 3. 8 + 22 + 2 4 2 + 4() 4. 1 22() + 2 + 2 2 Using two of these half reactions, write a balanced full-cell reaction for a fuel cell (consumes fuel and oxygen). Identify which reaction is occurring at the anode and which is occurring at the cathode. Using two of these half reactions, write a balanced full-cell reaction for a electrolysis cell (makes fuel and oxygen). Identify which reaction is occurring at the anode and which is occurring at the cathode.