In the given question, a statement is given followed by some conclusions. Choose the conclusion(s) which logically follow(s) the given statement.
Statement: Few shops on this road have neon lights, but they all have signboards.
Conclusions:
I. Some shops have either signboards.
II. Some shops have no signboards.
III. Some shops have no neon lights.
IV. Some shops have both signboards and neon lights.
A closed-loop system has the characteristic equation given by: $ s^3 + k s^2 + (k+2) s + 3 = 0 $.
For the system to be stable, the value of $ k $ is: