k1=.01;
k2=0.02;
k3=0.025;
av=40;
disp("Part a");
a1=av/(1-k1*av);
disp("the voltage gain is"); disp(a1);
disp("Part b");
a2=av/(1-k2*av);
disp("the voltage gain is"); disp(a2);
//a3=av/(1-k3*av);