Planet of the Apes

Question 1: In the original 1968 film "Planet of the Apes," what is the name of the astronaut played by Charlton Heston?
Question 2: Which acclaimed motion-capture actor portrayed the character of Caesar in the rebooted Planet of the Apes trilogy?
Question 3: In the rebooted series, what is the name of the virus that wiped out most of the human population?
Question 4: Which real-life sign language was used as the basis for the apes' communication in the rebooted films?
Question 5: In the original film series, what is the name of the planet on which the apes evolved and developed their own civilization?