How to swap arbitrum one to ETH?

Could you please elaborate on the process of swapping Arbitrum One to Ethereum (ETH)? Is it a straightforward procedure that can be done through a decentralized exchange or a centralized platform? Are there any specific steps that need to be followed, such as connecting a wallet, entering the desired swap amount, and confirming the transaction? Also, are there any fees associated with the swap, and if so, how are they calculated? Finally, is there a recommended time or market condition to execute the swap for optimal results?