r1=1500;
r2=1200;
b=100;
disp("Part a");
av=-b*r1/r;
disp("the voltage gain of the amplifier without feedback is"); disp(av);
disp("Part b");
r3=82;
k=r3/r1;
a1=av/(1-k*av);
disp("the voltage gain of the amplifier when the feedback capacitor is not connected is"); disp(a1);
disp("Part c");
r4=1000;
ro=r1*r4/(r1+r4);
av1=-b*ro/r2;
k=r3/ro;
a2=av1/(1-k*av1);
disp("the new voltage gain with feedback is"); disp(a2);