The Zodiac Killer's Ciphers

The Zodiac Killer's Ciphers trivia questions

1. In the Zodiac TV series, how many cipher messages did the killer claim to send to newspapers?
2. What was the primary newspaper that received most of Zodiac's cipher communications?
3. Which Zodiac cipher remained unsolved for the longest time in the actual case?
4. In the show's portrayal, what zodiac symbols did Zodiac use to sign his messages?
5. What was the name of the 340-character cipher sent in 1969 that stumped cryptographers?
6. How many victims did Zodiac claim responsibility for in his communications to press?
7. What homophone substitution technique was notably used in Zodiac's first cipher?
8. In the series, which specific cryptographic method did Zodiac employ in his unsolved 340-char message?
9. What was the approximate timeframe between Zodiac's last confirmed communication and first?
10. Which lesser-known cipher variation did Zodiac include featuring radical symbols in 1970?