$"$If you are short $5$ contracts of $2-$year pound futures with a delivery price $($K$)$ of $$1\mathrm{.}6,$ what will be your payoff at expiry if the pound exchange rate to dollar at expiry is $($i$)$ $$1\mathrm{.}2$

$,($ii$)$ $$1\mathrm{.}4$

$,($iii$)$ $$1\mathrm{.}8$

Each contract is $100$ shares. Round to integers."