Could you please elaborate on the process of unstaking Solana from the Binance platform? As a user interested in regaining access to my staked Solana tokens, I'm curious about the steps involved. Specifically, I'd like to know if there are any prerequisites, such as a minimum staking period or a fee associated with the unstaking process. Additionally, could you explain the estimated time it takes for the unstaking to complete and the tokens to become available for withdrawal or trading? I'd appreciate a detailed yet concise explanation of the entire unstaking procedure on Binance.