Which of the following are valid statements regarding changes to the taskbar on the computer's desktop?

• The taskbar must be locked before any of its properties can be changed.
• The taskbar can be moved from the bottom of the screen but cannot be displayed vertically.
• The taskbar cannot be moved from the bottom of the screen.
• Up to 10 programs can be pinned to the taskbar.
• The taskbar can be hidden when not being used by setting the Auto-Hide property.