undefinedA company has a policy of taking daily backup from Monday to Thursday and a weekly backup on Friday. Backups are taken at 11PM.An employee creates 20 new files (File1, File2...File20) on Monday and save it on the file server. He comes back on Wednesday and modifies File3 and File4 and save it back. On Thursday he creates 2 more files (File21 and File22). On Friday he opens up File 5 but close it immediately without making any modification. On Friday he also accidently deleted File3, File5 and File11. Which backup strategy (Full, Incremental or Differential) will restore all his files in the shortest amount of time? Explain how.