Under COLREGs Rule 35, what sound signals must a power-driven vessel make in or near an area of restricted visibility (e.g. dense coastal fog)?

1. Making way: 1 prolonged blast at intervals of not more than 2 minutes; Underway but stopped/not making way: 2 prolonged blasts separated by 2 seconds every 2 minutes
2. Making way: 3 short blasts every 1 minute; Stopped: 1 continuous blast of 30 seconds
3. Making way: ringing a bell rapidly for 5 seconds every 30 seconds
4. Making way: sounding 5 short rapid blasts every 5 minutes