The correct answers are: Pacific and North American.
The Pacific plate is located between Asia and Australia from one side, and North and South America on the other side, making the plate being artificially split into both the East and the West Hemisphere. The interesting part is the the western part of the plate is in the East Hemisphere, while the eastern part is in the Western Hemisphere.
The North American plate, in general is located in the West Hemisphere, apart from a small fraction of it that comes on the territory of Russia, the far eastern part of Russia to be more specific. So this small portion of the plate comes to be in the territory of the Eastern Hemisphere.
This is a very tricky question as you can get a lot of answers that will be partially correct.
The best answer in my oppinion is between the range of 7 minutes to around 15 minutes.
The reason why saying just one value isn'the best idea is because, if we have two groups of people, the average for the first group might be 7 minutes, and the average for the second group might be 11 minutes. So it's hard to say the average is 7 minutes. It's better presented in an interval where we can find this number :)
The way it looks and it's different color
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