Final answer:
In the short-run equilibrium, East Bubble's output is likely to decrease and its real exchange rate will decrease as well.
Step-by-step explanation:
In this scenario, East Bubble's main trading partner is West Bubble, and they have fixed exchange rates. When West Bubble employs a contractionary monetary policy to fight inflation, it will cause its currency to appreciate. As a result, the exports from East Bubble will decrease because foreign buyers will find them more expensive. The real exchange rate of East Bubble will also decrease due to the appreciation of West Bubble's currency.
Since West Bubble is implementing a contractionary monetary policy, it is aiming to reduce inflation. This policy will lead to a decrease in West Bubble's demand for goods and services, including those from East Bubble. As a result, East Bubble's output of exports will decrease. So, in the short-run equilibrium, East Bubble's output is likely to decrease and its real exchange rate will decrease as well.