$A$ |
$B$ |
$Y$ |
$0$ |
$0$ |
$0$ |
$0$ |
$1$ |
$1$ |
$1$ |
$0$ |
$1$ |
$1$ |
$1$ |
$0$ |
$P\,\, 1\,\, 1\,\, 0\,\, 0$
$Q\,\, 1\,\, 0\,\, 1 \,\,0$
$R\,\, 1\,\, 0\,\, 0 \,\,0$