fi, The open-loop system transfer function is G(S)-5(1+25)(1+5s) Plot Nyquist diagram of the system, then determine the stability of the systemo (104) 第4页共6页第 4 页 共 6 页 五、The open－loop system transfer function is ( 2 )( 5 ) 5 ( ) s s s G s    1 1 ，Plot Nyquist diagram of the system，then determine the stability of the system。（10 分）