Compute the truth-values of the following compound sentences, where A, B, and C are true; X, Y,
and Z are false; and P and Q are of unknown truth-value.
1. ~ B  X
2. A • ~ Z
3. ~ X  ~ C
4. (B  C)  (X • Y)
5. ~ (C  (X • ~ Y))
6. (X  ~ A)  (~ Z • B)
7. ~ (A  ~ X)  (C • ~ Y)
8. A  (~ X • ~ (C  Y))
9. ~ (~Z  ~ (~ (A  B)  ~ X))
10. ~ (A  ~ (~ C  ( B • ~ X)))  (~ ((~ Y  ~ A)  ~B) • (A  (((B  ~ X)  Z)  ~Y)))
11. ~ X  (Q  Z)
12. ~ Q • (A  (P • ~ B))
13. ~ (Q • ~ Z)  (~ P  C)
14. ~ (~ (A • B)  ((P  ~ C)  (~ X  Q)))
15. ~ P  (Q  P)