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Two eagles, \(1\) and \(2\) are flying in the sky, whose altitude is 5 \(m\) and 17 \(m\), respectively. They spot a rabbit and start flying to catch the rabbit at the same time.
1. If eagle \(1\) spots the rabbit at an angle of 30\(^{\circ}\), then the eagle must fly \(m\) to catch the rabbit.
2. If eagle \(2\) spots the rabbit at an angle of 60\(^{\circ}\), then the eagle must fly \(m\) to catch the rabbit.
3. The eagle will catch the rabbit first?
4. The angle of elevation and depression are always
5. The angle formed by the line of sight and the horizontal line when the point being viewed is above the horizontal level is
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