% function out ()104021130(6)
  
  a = 0;
  b = 1;
  n = 64;
  
  h = (b - a)/n;
  x = [a:h:b];
  f = exp(x.*(-1));
  w = ones(1,n+1);
  w(2:2:n) = 4;
  w(3:2:n-1) = 2;
  s = w*f'*h/3
  

  % end