A contractor is estimating a parking lot layout with 120 total parking stalls. According to CBC Chapter 11B, how many total accessible stalls must be provided, and how many of those must be van-accessible?

1. Exactly 4 total accessible stalls, with 2 van-accessible stalls required.
2. Exactly 6 total accessible stalls, with 2 van-accessible stalls required.
3. Exactly 5 total accessible stalls, with at least 1 van-accessible stall.
4. Exactly 8 total accessible stalls, with at least 2 van-accessible stalls.