QUESTION: answer this: to control depth of field and amount of light what should be adjusted??

ANS: the lens aperture diameter
input: What is the answer to this question? what are cardinal points of a thick lens?

output: principal points
In: who sings with neil young on four strong winds??

Out: Nicolette Larson
Please answer this: who sings you will always be my baby?

Mariah Carey
Q: Answer this question:

who played drums on the end by the beatles??

A: Ringo Starr
Question: waste water that contain solid and liquid excreta refers to?

Answer:
sewage