Oil settles down $2 a barrel, ends week lower on Fed worries, ample supply 
Oil ended the week markedly lower as traders worried about Federal Reserve rate hikes and signs of ample supply.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction: Oil settles down $2 a barrel, ends week lower on Fed worries, ample supply 

### Response: Oil ended the week markedly lower as traders worried about Federal Reserve rate hikes and signs of ample supply.