The design goals for a unity feedback control system having an open loop transfer function [ mathrm{G}(s)=frac{mathrm{K}}{s(s+1)(s+2)}

Question:

The design goals for a unity feedback control system having an open loop transfer function

\[
\mathrm{G}(s)=\frac{\mathrm{K}}{s(s+1)(s+2)} \text { are }
\]

1. velocity error coefficient $K_{V} \geq 10 \sec ^{-1}$.

2. stable open loop operation.

The value of $\mathrm{K}$ that should be chosen by designer, is
(a) $\mathrm{K}<6$
(b) $6<\mathrm{K}<10$
(c) $\mathrm{K}>10$
(d) None