For the following Matlab code:

a=11;               %Set 'a' as the number of rows/cols. in a square matrix A
A=ones(a,a);        %Set A as an 11x11 all-one matrix (All the elements are 1)
for m=1:a
    A(m,m)=0.9;     %Set all the elements on the main diagonal of A as 0.9
end
d=det(A);           %Calculate the determinant of A
c=abs(d*(10^a)+7);  %Adjust the value, and abs(.) is the absolute-value func.
answer=mod(c,5);    %mod(.) is the modulo operation

What is the value of "answer"?