Symmetric Matrices & Quadratic Forms · Easy problem

Let $A = \begin{pmatrix}5 & 1\\1 & 5\end{pmatrix}$ and $Q = \dfrac{1}{\sqrt2}\begin{pmatrix}1 & 1\\1 & -1\end{pmatrix}$, an orthogonal matrix whose columns are eigenvectors of $A$. Find the entry in row 2, column 2 of $Q^{T}AQ$.