Problem $2(4$ Points$)$: What is the answers for the following Boolean expression.

$A+A^{\text{'}}=$

$A^{\text{'}}=$

$A+A=$

$A+1=$

$(A^{\text{'}}{)}^{\text{'}}=$

$A\mathrm{.}1=$

$(AB{)}^{\text{'}}=$

$**$ The last expression is for DeMorgan's formula.