Prove the following tautologies by starting with the left side and finding a series of equivalent wffs that will convert the left side into the right side. You may use any of the equivalencies in the list on page 9 or the equivalencies from Exercise 26.
a. \(\left(A \wedge B^{\prime}\right)^{\prime} \vee B \leftrightarrow A^{\prime} \vee B\)
b. \(A \wedge\left(A \wedge B^{\prime}\right)^{\prime} \leftrightarrow A \wedge B\)
c. \((A \wedge B)^{\prime} \wedge\left(A \vee B^{\prime}\right) \leftrightarrow B^{\prime}\)