3. Examine the reaction mechanism found below: Step 1: P₂+Q₂ → 2PQ (slow) Step 2: 2PQ→→ P₂Q₂ (fast) Step 3: P₂Q₂ →→ P₂ + Z (very fast) a. Draw a circle around any reaction intermediates. b. Draw a box around any species that can be considered a catalyst. c. In the box above, provide the overall equation for this process. d. In the box below, provide the rate law based on this mechanism.