The transfer function  $G_P=\frac{4s}{4s^2+1}$  is:

• Stable with oscillations

• Unstable with oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{3}{s^2-9}$  is:

• Stable with oscillations

• Unstable with oscillations

• Stable without oscillations

• Unstable without oscillations

The transfer function  $G_P=\frac{s}{s^2-25}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{2}{\left(s+1\right)^2+4}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{6}{9s^2+4}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{s+3}{\left(s-2\right)\left(s+1\right)}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{1}{s^2-2s+9}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{2s}{\left(s^2+1\right)^2}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{2s+3}{^{s^2+6s+13}}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations

The transfer function  $G_P=\frac{s+3}{^{s\left(s^2+1\right)}}$  is:

• Stable with oscillations

• Unstable without oscillations

• Stable without oscillations

• Unstable with oscillations