v=12;
r1=1;
r2=2;
r3=3;
r4=4;
r5=5;
ra=r2*r3/(r1+r2+r3);
rb=r3*r1/(r1+r2+r3);
rc=r1*r2/(r1+r2+r3);
r=ra+(rc+r3)*(rb+r4)/(rb+rc+r3+r4);
disp("the total resistance (in Ω) is"); disp(r);
i=v/r;
disp("the total current (in A) supplied by the source is"); disp(i);