Exercise $3\mathrm{.}9\mathrm{.}2$ : Suppose we filter candidate pairs based only on length, as in Section $3\mathrm{.}9\mathrm{.}3.$ If $s$ is a string of length $20,$ with what strings is $s$ compared when $J,$ the lower bound on Jaccard similarity has the following values:

$($a$)J=0\mathrm{.}85$

$($b$)J=0\mathrm{.}95$

$($c$)J=0\mathrm{.}98?$