5. Announce that one Iranian city will be utterly obliterated every day at random, inshallah, until the hostages and their ships are released unharmed and undamaged.
If people or equipment are injured or damaged, 10X proportional damage will be inflicted on Iranian interests, not limited to those in Iran proper, just as a friendly reminder to not do that again.
You have 5 business days to think it over...
Oh, and any Iranian military assets who attempt to interfere will simply cease to exist.