Ultraviolet radiation can release \(\text{Cl}^{\boldsymbol{\cdot}}\text{(g)}\) from \(\text{CF}_2\text{Cl}_2\text{(g)}\) in the stratosphere. A student examines the following proposed chlorine monoxide dimer cycle. In the mechanism, \(\text{M(g)}\) is an unreactive third-body collision partner, and step \(1\) occurs twice for every one occurrence of each other step.

Step \(1\):
\[ \text{Cl}^{\boldsymbol{\cdot}}\text{(g)}+\text{O}_3\text{(g)}\rightarrow\text{ClO}^{\boldsymbol{\cdot}}\text{(g)}+\text{O}_2\text{(g)} \]

Step \(2\):
\[ 2\,\text{ClO}^{\boldsymbol{\cdot}}\text{(g)}+\text{M(g)}\rightarrow\text{Cl}_2\text{O}_2\text{(g)}+\text{M(g)} \]

Step \(3\):
\[ \text{Cl}_2\text{O}_2\text{(g)}+h\nu\rightarrow\text{Cl}^{\boldsymbol{\cdot}}\text{(g)}+\text{ClOO}^{\boldsymbol{\cdot}}\text{(g)} \]

Step \(4\):
\[ \text{ClOO}^{\boldsymbol{\cdot}}\text{(g)}\rightarrow\text{Cl}^{\boldsymbol{\cdot}}\text{(g)}+\text{O}_2\text{(g)} \]

Which choice correctly identifies a catalyst and a reaction intermediate, respectively, in the proposed cycle?