Which ones from the following systems is invertible, causal and stable?
1
\(H\left( s \right) = \frac{{s + 2}}{{{s^2} - 2s - 3}}\)
2
\(H\left( s \right) = \frac{{s - 2}}{{{s^2} + 4s + 3}}\)
3
\(H\left( s \right) = \frac{{s + 2}}{{{s^2} + 4s + 3}}\)
4
\(H\left( s \right) = \frac{{s - 2}}{{{s^2} - 2s - 3}}\)