If $$s^3+\;3s^2\;+\;4s\;+A\;=\;0$$ ,then all the roots of this equation are in the left half plane provided that

2’s complement representation of a 16-bit number (one sign bit and 15 magnitude bits) is FFFI. Its magnitude in decimal representation is

For the logic circuit shown in Figure, the output is equal to

Boolean expression for the output of XNOR (equivalence) logic gate with inputs A and B is