According to Rashi...
1. Why are the laws of people taught only after the laws of animals? (12:2)
2. Why does the person with tzaraat have to go into isolation? (13:46)
3. Why are birds required to atone for tzaraat? (14:4)
4. Why is cedar wood required? (14:4)
5. How could tzaraat on the house be good news? (14:34)