Given the statements:

• $\text{P}$ is the sister of $\text{Q}$.
• $\text{Q}$ is the husband of $\text{R}$.
• $\text{R}$ is the mother of $\text{S}$.
• $\text{T}$ is the husband of $\text{P}$.

Based on the above information, $\text{T}$ is ____________ of $\text{S}$.

1. the grandfather
2. an uncle
3. the father
4. a brother