The forward path transfer functions of unity feedback control systems are given below.

(a) \(K G(s)=\frac{K(s+4)}{s\left(s^{2}+4 s+4ight)(s+5)(s+6)}\)

(b) \(K G(s)=\frac{K}{s(s+2)(s+5)(s+10)}\)

(c) \(K G(s)=\frac{K\left(s^{2}+2 s+10ight)}{s(s+5)(s+10)}\)

(d) \(K G(s)=\frac{K\left(s^{2}+4ight)}{(s+2)^{2}(s+5)(s+6)}\)

Construct the root loci for \(K \geq 0\).