Figure shows the bode magnitude plot of a system. The minimum phase transfer function of the system is given by
1
\(\frac{{80\left( {\frac{s}{2} + 1} \right)}}{{s\left( {\frac{s}{{20}} + 1} \right)}}\)
2
\(\frac{{20\left( {\frac{s}{2} + 1} \right)}}{{s\left( {\frac{s}{{20}} + 1} \right)}}\)
3
\(\frac{{8\left( {s + 2} \right)}}{{s\left( {s + 20} \right)}}\)
4
\(\frac{{8\left( {s + 2} \right)}}{{s\left( {s - 20} \right)}}\)