//EXAMPLE 7-18  PG NO-477-478
Ra=7;
Rb=3;
Rc=3;
A=(Ra+Rb)/Rb;
disp(' A  is   = '+string(A)+'');
B=Ra+Rc+[(Ra*Rc)/Rb];
disp(' B is   = '+string(B)+'');
C=1/Rb;
disp(' C is   = '+string(C)+'');
D=(Rb+Rc)/Rb;
disp(' D is   = '+string(D)+'');
Z11=[(A*B)/(C*D)]^0.5;
disp(' Impedance is   = '+string(Z11)+'ohm');
Z12=[(B*D)/(A*C)]^0.5;
disp(' Impedance is   = '+string(Z12)+'ohm');
Q=1/cosh(2.62);
Y12=-(1/17);
disp(' Admittance is   = '+string(Y12)+'siemens');