Which one of the following options is not a property of Boolean Algebra?

Note: + is OR operation, • is AND operation, and ' is NOT operation

Consider the following Boolean expression of a function $F$ :

$$ F(P, Q)=(\bar{P}+Q) \oplus(\bar{P} Q) $$

Which of the following expressions is/are equivalent to $F$ ?

The following two signed 2's complement numbers (multiplicand M and multiplier Q ) are being multiplied using Booth's algorithm :

M : 1100110111101101 and Q : 1010010010101010

The total number of addition and subtraction operations to be performed is ________ (Answer in integer)

Let $X$ be a 3-variable Boolean function that produces output as ' 1 ' when at least two of the input variables are ' 1 '. Which of the following statement(s) is/are CORRECT, where $a, b, c, d, e$ are Boolean variables?