As soon as you enter the Den look to your left for a wall to crash into. Inside youll have to use your slingshot to knock a case off the shelf. Inside is your first collectible. After you use the box ...

In the first house where you have to jump window to window look for a hidden collectible in your path. The fourth house after the window to window sequences look for a collectible on the second floor.

Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...