Write the Overall Equation of Reaction for the Following Mechanism $\rightarrow$

Write the overall equation of reaction for the following mechanism and identify the reaction intermediates:
Cl₂ $\rightarrow$ 2 Cl•
Cl• + CO $\rightarrow$ COCl
COCl + Cl₂ $\rightarrow$ COCl₂ + Cl•
2 Cl• $\rightarrow$ Cl₂