An open loop transfer function $G(s)$ of a system is

$G(s)=\dfrac{k}{s(s+1)(s+2)}$

For a unity feedback system, the breakaway point of the root loci on the real axis occurs at,

1. $−0.42$
2. $−1.58$
3. $−0.42$ and $−1.58$
4. None of the above