If a commercial truck driver splits their mandatory 45-minute break during a 4.5-hour driving block, in what exact sequence and durations must the two periods be taken?

1. The first break must be at least 15 minutes, followed later by a second break of at least 30 minutes (15 min + 30 min)
2. The first break must be 30 minutes, followed by 15 minutes (30 min + 15 min)
3. Two equal breaks of 22.5 minutes each
4. Three separate breaks of 15 minutes each