If $R = \{(x, y) : x, y \in Z, x^{2} + 3y^{2} \leq 8\}$ is a relation on the set of integers $Z$, then the domain of $R^{-1}$ is (1) $\{-2, -1, 1, 2\}$ (2) $\{0, 1\}$ (3) $\{-2, -1, 0, 1, 2\}$ (4) $\{-1, 0, 1\}$
If $R = \{(x, y) : x, y \in Z, x^{2} + 3y^{2} \leq 8\}$ is a relation on the set of integers $Z$, then the domain of $R^{-1}$ is\\
(1) $\{-2, -1, 1, 2\}$\\
(2) $\{0, 1\}$\\
(3) $\{-2, -1, 0, 1, 2\}$\\
(4) $\{-1, 0, 1\}$