//chapter 12
//example 12.5
//page 485
printf("\n")
printf("given")
rs=600;f1=100;Yfs=6000*10^-6;R1=4.7*10^6;R2=1*10^6;Rd=6.8*10^3;Rl=120*10^3;
Xc2=1/Yfs
C2=1/(2*3.14*f1*Xc2)
Zi=(R1*R2)/(R1+R2)
C1=1/(2*3.14*f1*(Zi+rs)/10)
C3=1/(2*3.14*f1*(Rd+Rl)/10)