The correct preposition in this context is "at," which is used to indicate a position or presence at a location or event.
- "With" refers to accompaniment, "of" indicates possession, and "from" indicates origin, none of which fit the context of being at an event.
"At" is used to indicate someone's presence at a specific event or location, such as "at the party."
The manager asked the team to complete the project _______ the end of the week.