\textbf{145-} If $A_i = \left[-i,\, \dfrac{9-i}{2}\right]$, $i \in \{1,2,3,\ldots,9\}$, then the set $(A_1 \cap A_2) - (A_2 \cap A_5)$ is which of the following?
(1) $(-2,-1) \cup (1,2]$ \qquad (2) $[-2,-1] \cup [1,2]$ \qquad (3) $[-1,1]$ \qquad (4) $\phi$