The combination of gates shown below yields:

In the digital circuit shown in the figure,for the given inputs,the $P$ and $Q$ values are:

For the combination of logic gates shown in the figure,the equivalent logic gate is

For a two-input $AND$ gate,the four entries are shown in the truth table. Identify the correct ones out of these ($A, B =$ input,$Y =$ output).

Entry	$A$	$B$	$Y$
$1$	$0$	$1$	$0$
$2$	$1$	$0$	$0$
$3$	$1$	$1$	$1$
$4$	$0$	$0$	$1$

What will be the input of $A$ and $B$ for the Boolean expression $\overline{(A+B) \cdot(A \cdot B)}=1$?

The circuit diagram shows a logic combination. Initially, for inputs $P, Q, R$ and $S$ all at state $1$, the outputs are $X=1, Y=1$ and $Z=0$. When inputs $P$ and $R$ change to state $0$ while inputs $Q$ and $S$ remain at state $1$, what are the new states of outputs $X, Y$ and $Z$?