Find, the unknowns $("$aaa$"$ through $"$ggg$")$ in the table of closed traverse starting from $BM$ and ending with $BM$

$BS=$ Backsight

$FS=$ Foresight

IS $=$ Intermediate Sight $($height of equipment$)$

$RL=$ Reduced Level

ERR $=$ Error

$\backslash$table$[[\backslash$table$[[\backslash$table$[[$BS$],[1\mathrm{.}672]]]],$IS$,\backslash$table$[[$FS$],[q,$