a. Why don’t most companies do a full back up every night? b. What is incremental backup (be precise)? c. A company does a full back up one night. Call this backup Cardiff. On three successive nights,...

a. Why don’t most companies do a full back up every night? b. What is incremental backup (be precise)? c. A company does a full back up one night. Call this backup Cardiff. On three successive nights, it does incremental backups, which it labels Greenwich, Dublin, and Paris. In restoration, what backups must be restored first and second?