Which combination of California motorcycle facts is correct?

1. 20 questions; 90% to pass; helmet optional; lane splitting illegal
2. 30 questions; 80% to pass (24/30); helmet required for all riders; lane splitting legal when safe and prudent
3. 46 questions; 70% to pass; helmet required only under 21; lane splitting illegal
4. 30 questions; 100% to pass; no helmet law; lane splitting only at night