% for question 6
format long;
f=@(x) exp(-x);
h=1/64;
L=h/3*(f(0)+f(1));
for i = 1:63
  if mod(i,2)~=0
    L = L + 4*h/3*f(0+i*h);
  elseif mod(i,2)==0
    L = L + 2*h/3*f(0+i*h);
    endif
    endfor
    L