https://www.gamespot.com/articles/fortnite-week-4-challenges-where-ice-cream-trucks-/1100-6457429/

A new Fortnite update is now available on PC, PS4, and Xbox One, but in addition to checking out the new stuff it has to offer, Battle Royale players have some other things they can now do. Fortnite's week 4 challenges have rolled out for Battle Pass owners, and some of them might prove to be tricky.

The full list of challenges is outlined below; one requires you getting the right weapon and utilizing it efficiently (dealing a specific amount of damage with a sniper rifle), while another has you tracking down chests in the Flush Factory or supply drops around the map. There are two in particular that you might need some help with.