$5\mathrm{.}1$ Write the Boolean expression for the output, $F$ from the electronic devices shown below:

$5\mathrm{.}2$ Draw up the truth table to verify that $A=B\frac{+}{b}ar(B)$ and $\frac{?}{\text{b}\text{a}\text{r}}(A)\frac{}{b}ar(B)+$A are logically equivalent.