If you open Tools menu -> Options... -> Environment -> Keyboard you can find a list of available commands and what shortcuts are currently set. Many commands do not have a shortcut assigned.
I don't know about being able to jump to a specific tab such as your example, but I did find the following 2 commands:
Window.NextDocumentWindow (Default Shortcut: Ctrl + F6)
Window.PreviousDocumentWindow (Default Shortcut: Ctrl + Shift + F6)
That will at least allow you to cycle through tabs via the keyboard - tested it out.