Answer
The Boolean expressions for the two cases are
$\overline{a} \cdot b$
a. $\overline{b}$
Combining these two by using the OR operator produces
$\overline{a} \cdot b+a \cdot \overline{b}$
Pictorially, the corresponding circuit diagram is
Work Step by Step
The Boolean expressions for the two cases are
$\overline{a} \cdot b$
a. $\overline{b}$
Combining these two by using the OR operator produces
$\overline{a} \cdot b+a \cdot \overline{b}$
Pictorially, the corresponding circuit diagram is
