Consider the following chemical equation:
\(p \, \text{MnO}_2 + q \, \text{Al} \rightarrow r \, \text{Mn} + s \, \text{Al}_2\text{O}_3\)
To balance this chemical equation, the values of the coefficients \(p\), \(q\), \(r\), and \(s\) must be respectively: