Backup and Restore

Which system technology should be used for backups?
Which SW tools should be used for the backup management?
Who is responsible for the backup system?
Which data should be archived in which cycles?
How are the integrity and confidentiality of the backups guaranteed (for example via encryption)?
How is the physical security of backups (for example, storage at different locations) be guaranteed?
How long and how many backup versions should be kept in memory?
Are there any regulatory requirements for data backup?
Are Restore procedures known and tested?
Should Restore tests be carried out regularly?
How fast should which specific data be recovered?