Divide elements between 2 matrices

I have a matrix

M1 =[4 3 6 8 1 10 5 2 9 4 5 6
1 10 3 9 4 2 5 7 6 5 4 3
9 5 1 7 8 10 3 4 2 6 5 1];

M2 =[1 6 3 5
3 5 9 6
2 1 9 5];

If it is column 1, 5, or 9 in M1 then divide by column 1 in M2 If it is column 2, 6, or 10 in M1 then divide by column 2 in M2 If it is column 3, 7, or 11 in M1 then divide by column 3 in M2 If it is column 4, 8, or 12 in M1 then divide by column 4 in M2

and it will give an output of a matrix 3x12

output =[4    0.5  2     1.6  1     1.66667 1.66667  0.4 ...
         0.33  2   0.33  1.5  1.33  0.4     0.5556   1.116 ...]

.

.

Answer 1

[Azzi Abdelmalek]

M1 =[4 3 6 8 1 10 5 2 9 4 5 6
  1 10 3 9 4 2 5 7 6 5 4 3
  9 5 1 7 8 10 3 4 2 6 5 1];
M2 =[1 6 3 5
  3 5 9 6
  2 1 9 5];
[n,m]=size(M1);
a=reshape(M1,n,4,[]);
b=bsxfun(@rdivide, a,M2);
out=b(:,:)

[N.]

Thank you so much!