Q: Will the producer of Easy Rider become an octogenarian in 2021?
A: The producer of Easy Rider was Peter Fonda. Peter Fonda died in 2019 at the age of 79. An octogenarian is someone who is between 80 and 89 years old and is still alive.
The answer is no.

Q: Is latitude required to determine the coordinates of an area?
A: Longitude is one of the required data points needed for determining coordinates. Latitude is the other angle required to determine coordinates of an area.
The answer is yes.

Q: Could you brew beer from start to finish in the month of September?
A: Brewing a batch of beer takes at least 5 weeks. There are 30 days, or 4 1/2 weeks, in the month of September.
The answer is no.

Q: Did breakdancing grow in popularity during WW2?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Breakdancing was created by the African American youth in the early 1970s. World War II was a global war that lasted from 1939 to 1945.
The answer is no.