A unity feedback control system is characterized by the open-loop transfer function $$G\left( s \right) = \frac{{10k\left( {s + 2} \right)}}{{{s^3} + 3{s^2} + 10}}.$$    The Nyquist path and the corresponding Nyquist plot of G(s) are shown in the figure below.
If 0 < k < 1, then the number of poles of the closed–loop transfer function that lie in the right-half of the s-plane is