A customer performs a full backup on the first Sunday of the month followed by a cumulative backup on the other Sundays. They also perform an incremental backup each day Monday through Saturday. Tapes are sent offsite for disaster recovery every morning at 10 a.m. The customer experiences a system crash on the Wednesday of the third week at 3 p.m., requiring a system recovery. How many days worth of tapes need to be retrieved to perform a recovery?

Full Backup: Complete reinforcement of the framework. (Which happens on first sunday.) Total Backup: Backups all progressions after full reinforcement. (just changes) (Which happens each other sunday.) Incremental Backup: Backsup all progressions since last incremental/full reinforcement. (Each and every other day.) Full reinforcement is made on first Sunday. Total reinforcement is made on second sunday and in addition third sunday. Inremental reinforcement is made on third monday, and third tuesday, third wednesday too. Presently an accident happened. Along these lines, to recuperation, the incremental reinforcement circles of Wednesday, tuesday, and monday will take the framework stable to last sunday. At that point the combined reinforcement circle will take the framework stable to first sunday of the month. At that point the full reinforcement circle will make the framework stable totally. Along these lines, to recoup, you require, Wednesday, Tuesday, Monday incremental reinforcement tapes. (3)

Last Sunday aggregate incremental reinforcement tape. (1)

That months first sunday full reinforcement tape. (1)