Answer:
A. Scotland - Comparative Advantage in Scones, Sweaters. England - Comparative Advantage in Scones, Scotland - Comparative Advantage in Sweaters
B. England sell Scones , Scotland sell Sweaters
C. Yes, it would still be gainful for England
Explanation:
Scones Sweaters Trade off (Scones:Sweaters)
England 30 1 30:1
Scotland 40 2 20:1
a. Scotland has absolute advantage in both Scones & Sweaters, as - it can produce more of both goods than England. (scones 40 > 30) (sweaters 2 >1)
b. England has comparative advantage in Scones, Scotland in Sweaters, as- Scotland has less opportunity cost of sweaters in terms of Scones sacrifised (20 < 30). England is relatively more productive in Scones that sweater than Scotland (30X > 20X)
c. Yes, England still gains from trade if Scotland produces 1sweater/ hour, as It might get exchange ratio better than domestic trade off ratio. Getting >30, scones per one sweater is anyways gainful trade term for England