<s>[INST] Here is a question about matrix calculus that I don't know how to solve. The question is:

Given that $f(\mathbf{x}) = \mathbf{x}^T\mathbf{A}\mathbf{x}$, where $\mathbf{x} \in \mathbb{R}^n$ and $\mathbf{A} \in \mathbb{R}^{n \times n}$, compute $\frac{\partial f}{\partial \mathbf{x}}$.[/INST]