How do I withdraw from arbitrum to Ethereum?

Excuse me, could you kindly elaborate on the process of withdrawing funds from Arbitrum to Ethereum? I'm a bit unsure about the specific steps involved and would appreciate it if you could guide me through the procedure. Are there any prerequisites or requirements that I need to fulfill before initiating the withdrawal? Additionally, are there any potential fees or delays that I should be aware of? Your expertise in this matter would be invaluable in helping me navigate this process smoothly. Thank you in advance for your assistance.