\[ \text { Let } \begin{aligned} U & =\{q, r, s, t, u, v, w, x, y, z\} \\ A & =\{q, s, u, w, y\} \\ B & =\{q, s, y, z\} \end{aligned} \] $C=\{v, w, x, y, z\}$. List the elements in the set. 8) $A \cap B^{\prime}$

Step 1 ：Define the universal set U = \{q, r, s, t, u, v, w, x, y, z\}, set A = \{q, s, u, w, y\}, and set B = \{q, s, y, z\}.

Step 2 ：Find the complement of set B, denoted as B', which is the set of all elements in the universal set U that are not in B. B' = \{r, t, u, v, w, x\}.

Step 3 ：Find the intersection of set A and B', denoted as A ∩ B'. This is the set of all elements that are in both A and B'. A ∩ B' = \{u, w\}.

Step 4 ：\(\boxed{\{u, w\}}\) is the final answer.