I am seeking advice on the best approach to apply for visitor visas for my in-laws and brother-in-law. My wife is pregnant and they are planning to visit during the delivery time and will be here for a month. Should I submit one application for all of them together, or would it be better to apply first for my in-laws and then separately for my brother-in-law once the first application is approved? I want to maximize the chances of approval for their visit. Any insights or experiences with similar situations would be greatly appreciated. Thank you!"