Q:$4$:$\{5\}|$n leveling across a river, reciprocal leveling observations were:

Instrument at $E$ Reading at $V=1\mathrm{.}753m$

Instrument at $E$ Reading at $W=2\mathrm{.}550m$

Instrument at F Reading at $V=2\mathrm{.}080m$

Instrument at F Reading at $W=2\mathrm{.}985m$

If elevation of $V=100\mathrm{.}250m$ obtain that of $W.$