Determine the critical value(s) and rejection region(s) for a two-tailed $z$-test with $\alpha =0.08$.

Critical values: $z=-1.64$, $z=1.64$

Rejection regions: , $z>1.64$

Critical values: $z=-1.75$, $z=1.75$

Rejection regions: , $z>1.75$

Critical values: $z=-1.96$, $z=1.96$

Rejection regions: , $z>1.96$

Critical values: $z=-2.33$, $z=2.33$

Rejection regions: , $z>2.33$