Assume that the comparative$-$cost ratios of two products$-$baby formula and tuna fish$-$are as follows in the nations of Canswicki and Tunata:

Canswicki: $1$ can baby formula $=5$ cans tuna fish

Tunata: $1$ can baby formula $=7$ cans tuna fish

In what product should each nation specialize?

Canswicki should produce $($Click to select$),$ and Tunata should produce $($Click to select$).$

Would the following terms of trade be acceptable to both nations?

a$.1$ can baby formula $-=5\mathrm{.}5$ cans tuna fish: $($Click to select$)vv$

b$.1$ can baby formula $-=4$ can tuna fish: $($Click to select$)v$

c$.1$ can baby formula $-=8$ cans tuna fish: $($Click to select$)vv$