Harry and Sally can both produce fish and fruit. Sally can produce $1$ kg of fish in $4$ hours and $1$ kg of fruit in $5$ hours. Harry can produce $1$ kg of fish in $5$ hours and $1$ kg of fruit in $2\mathrm{.}5$ hours. Each person wants to have $4$ kgs of fish and $6$ kgs of fruit per week. Each person works for $20$ hours a week. Who has a comparative advantage in fish? Who has a comparative advantage in fruit?

Sally, Sally

Harry, Sally

Sally, Harry

No one, Sally

Harry, Harry