A differential leveling loop began and closed on BM Pine $($orthometric height $900\mathrm{.}34$ ft $).$

The plus sight and minus sight distances were kept approximately equal. Readings $($in

feet$)$ listed in the order taken are:

$7\mathrm{.}12(+S)$ on BM Pine

$6\mathrm{.}45(-S)$ on TP $1$

S$)$ on TP$1$

$4\mathrm{.}67(-S)$ on BM Oak

S$)$ on TP$2$

$3\mathrm{.}62(-S)$ on BM Pine

Prepare and adjust the notes. $(10$ points$)$