help me please!!!! ​

1) My cousin, which lives in Manhattan, has an apartment overlooking the city

2) Our new car, which we bought this year, is environmentally friendly

3) Poland, which in central Europe, has a very diverse climate

4) Northern Ireland, which smallest country in the UK, has a population of around 2 million

5) These low-energy light bulbs, which supposed to save many, are actually quite expensive