A block diagram is shown below.
The transfer function for this system is
1
\(\frac{{2s\left( {2s + 1} \right)}}{{2{s^2} + 3s + 5}}\)
2
\(\frac{{2s\left( {2s + 1} \right)}}{{2{s^2} + 13s + 5}}\)
3
\(\frac{{2s\left( {2s + 1} \right)}}{{4{s^2} + 13s + 5}}\)
4
\(\frac{{2s\left( {2s + 1} \right)}}{{4{s^2} + 3s + 5}}\)