Using the $z \text { table (Table } \mathrm{E}),$ find the critical value (or values) for each.
$$
\begin{array}{l}{\text { a. } \alpha=0.10 \text { , two-tailed test }} \\ {\text { b. } \alpha=0.01, \text { right-tailed test }} \\ {\text { c. } \alpha=0.005 \text { , left-tailed test }} \\ {\text { d. } \alpha=0.01, \text { left-tailed test }} \\ {\text { e. } \alpha=0.05, \text { right-tailed test }}\end{array}
$$