\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
A person on a Ferris wheel is at a height \(h(t) = 12 - 11\cos(\frac{\pi}{5}t)\) metres, where \(t\) is in minutes.
  1. Find the minimum and maximum height.
  2. Find the period of the ride.
  3. Find the height after 2.5 minutes.

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