yt = y'; Xt = X';
  bt = Xt \ yt
  bt =
   0.1457109
  -0.0777564
  -0.0712427
  -0.0166193
   0.0292955
  -0.0079111
   0.2265894
  -0.0561589
  -0.1752146
  -0.2577663