function [z2]=subz2T(zs2,zr2,zsr2,zl2,m); z2=zeros(5); z2(1,1)=zs2; z2(2,2)=zr2; z2(3,3)=m*zl2; z2(4,4)=(1-m)*zl2; z2(5,5)=zsr2;