Smith & Jones law firm merged with Black & White law firm to form a new firm: Smith, Jones, Black & White. Before the merger, two attorneys from Smith & Jones, Bob Jackson and Sharon Fields, left the firm to form their own firm. The firm of Smith, Jones, Black & White have all of Smith & Jones' closed files, including the files of Bob and Sharon, who left the firm prior to the merger.

1. What is Smith, Jones, Black & White's obligation with regard to the closed files of Bob Jackson and Sharon Fields?
2. May they destroy the files? If not, why not? If they may, how?
3. If you were the managing partner of Smith, Jones, Black & White, what would you do with Bob and Sharon's files?