Consider the series $\displaystyle \sum_{n=1}^{\infty} \frac{2}{n + 7}$. Let $s_n$ be the n-th partial sum; that is,
$$s_n = \sum_{i=1}^n \frac{2}{i + 7} .$$
Find $s_{4}$ and $s_{8}$
$s_{4}$ =
$s_{8}$ =