Q--If your skin was turning the color of a zombie, could it be because of nickel?
A--My step-by-step reasoning: Zombies are often depicted as green in pallor. Nickel in jewelry often turns skin a greenish color.
So, the answer is yes.

Q--Would Bonanza marathon end before WWE Heat marathon?
A--My step-by-step reasoning: Bonanza had a total of 431 episodes. WWE Heat had a total of 513 episodes. The average run time of WWE Heat was 45 minutes. The average run time of Bonanza was 49 minutes.
So, the answer is no.

Q--Can Billie Eilish afford a Porsche?
A--My step-by-step reasoning: Billie Eilish is a famous female singer. Billie Eilish is 18 years old and has a net worth of $25 Million. A Porsche Boxster is a car that starts at $59,000. $25,000,000 is greater than $59,000.
So, the answer is yes.

Q--Did any citizen of San Antonio vote for Boris Johnson?
A--
My step-by-step reasoning: San Antonio is a city in Texas in the United States of America. Boris Johnson is the Prime Minister of the UK. Only UK and commonwealth citizens may vote in UK elections.
So, the answer is no.