9.10 In Figure P9.10 the Bode plots of an unknown system are given. Select a transfer function that can be used to best describe the given Bode diagrams among the following (explain qualitatively and quantitatively your selection): Fi (a) G1(s)=k(s+1)2(Ts+1) (b) G2(s)=k(s+1)2(Ts+1) (c) G3(s)=ks(s+1)(Ts+1) (d) G4(s)=ks(s+1)(Ts+1) where k>0,T>0 and >0 in all cases. For the transfer function selected, estimate the values of the parameters k,T and