Question: Does Zelda Williams have any cousins on her father's side?
Answer: Robin Williams was the father of Zelda Williams. Robin Williams was an only child. A cousin is the child of a parent's siblings. Only children do not have siblings.. The answer is: no.

Question: Do salmon mate in the Caspian Sea?
Answer: Salmon reproduce in freshwater. The Caspian Sea is a saltwater lake.. The answer is: no.

Question: Was Walt Disney able to email his illustrations to people living far away?
Answer:

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.
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Walt Disney died in 1966. Modern email came into existence in 1971.. The answer is: no.