Question $1($Anonymity Systems$)$: $[20$ points$]$ In class we introduced three anonymity systems: Crowds, Mixnets, and Tor. For each of the following adversaries, discuss which of $$sender anonymity$,$receiver anonymity$$ or $$sender$-$receiver anonymity$$ are preserved: a$)[6$ points$]$ Your Internet provider $($ISP$)$ b$)[6$ points$]$ A single malicious node in an anonymity system $($e$.$g$.,$ a relay in Tor, a jondo in Crowds, or a mix in Mixnets$)$ c$)[8$ points$]$ A resourceful government agency who can monitor traffic at any desired place on the Internet