For fun - here's the answer.
L3 - Yes It is beneficial
Benefits of trade as a result of globalisation (comparative advantage/specialisation, bring in some economies of scale into this point)
Benefits of FDI as a result of globalisation (Draw LRAS shifting right or AD shifting right)
Knowledge/Technology transfer as a result of globalisation (from MEDCs to LEDCs)
L4 - No it isn't
Costs of trade (Could do trade diversion diagram here. Then point out that MEDCs in local areas (e.g. EU/NAFTA) tend to not let developing countries further away in so they will always be the losers when trading with MEDCs - Plus add in here that LEDCs tend to produce low value add goods which means it's easy for MEDCs to up sticks and find another trading partner.
Costs of FDI - it's fickle and could move suddenly, MEDCs dictate terms of trade
Foreign workers - There are 250k Chinese people living in Angola, so top level jobs are kept open for foreign workers who just repatriate income and don't really benefit local economy.
L4+
Globalisation isn't perfect but if you're trying to fill the savings gap (as per Harrod-Domar) and make Investment happen then it's a great option.
Globalisation can be beneficial for countries if their cultures are exported around the world. This could boost tourism or trade for local articles (e.g. Jamaica and Marijuana...!)
Conclusion - Whether or not globalisation benefits a developing nation largely depends upon the terms of trade. If they rely on and trade with MEDCs and tend to offer only low- value add services then it's likely that globalisation will not be as beneficial for this country as they might hope.