e\] (i) Let $W(x,y)$ be a Type I formal weight enumerator of the form (\[eq:fwe\_form\]). Then we have $$d\leq 0\left[ \frac{n-0}{0} \right] +0.$$ (ii) Let $W(x,y)$ be a Type IV formal weight enumerator of the form (\[eq:fwe\_form\]). Then we have $$d\leq 0\left[ \frac{n-0}{0} \right] +0.$$ 