//chapter 12
//example 12.21
//page 522
printf("\n")
printf("given")
f1=25;R2=24.7*10^3;R3=47*10^3;hie=1.2*10^3;hib=24;Rc=9*10^3;Rl=90*10^3;
Zi=(R2*R3*hie)/(R2*R3+R2*hie+R3*hie)
C1=1/(2*3.14*f1*(Zi/10))
C2=1/(2*3.14*f1*(hie/10))
C3=1/(2*3.14*f1*hib)
C4=1/(2*3.14*f1*((Rc+Rl)/10))