Currently, the portfolio's delta is $500,$ and the gamma is $3500.$ A traded option is available with a delta of $0\mathrm{.}7$ and a gamma of $2.$ What position is needed to neutralize both delta and gamma in a portfolio?

$1500$ long positions in options, $850$ short positions in underlying assets

$1500$ short positions in options, $850$ long positions in underlying assets

$1750$ short positions in options, $725$ long positions in underlying assets

$1750$ long positions in options, $725$ short positions in underlying assets