I'm interested in withdrawing my Starcoin holdings, but I'm not quite sure how to proceed. Could you provide a step-by-step guide on the withdrawal process? Specifically, I'd like to know if there are any prerequisites I need to fulfill, such as minimum withdrawal amounts or verification steps. Additionally, I'm curious about the estimated time it takes for the withdrawal to be processed and reflected in my account. Finally, are there any fees associated with withdrawing Starcoin, and if so, how much should I expect to pay? Your guidance in this matter would be greatly appreciated.