Problem 2) (2 points) Let $A = \{-7, -2, 0, 2, 7, 8, 10\}$, and define an equivalence relation $\mathcal{R}$ on $A$ as follows: $(x, y) \in \mathcal{R}$ if and only if $x \equiv y \pmod{4}$. Find all distinct equivalence classes and give a partition of $A$ into equivalence classes with respect to $\mathcal{R}$.