transfer function reduction.techniques with matlab 2016b

I want to obtain the pole zero plots of this system. I an using MATLAB 2016b. I tried the following code:

s=tf('s');

G1=1/((0.1)*(s));

G2=1/(s+1);

G3=6*(s+5)/(s+10);

H1=5;

G1.InputName='e1';

G1.OutputName='e2';

G2.InputName='e3';

G2.OutputName='e4';

G3.InputName='e4';

G3.OutputName='y';

sum1=sumblk('e1','u','f1','+-');

sum2=sumblk('e3','e2','f2','+-');

f1=e4*5;

OutoutTF = connect(G1,G2,G3,sum1,sum2,'u','y');

But it is not working