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Let the line L pass through (1, 1, 1) and intersect the lines 4 1 z 3 1 y 2 1 x − = + = − and . 1 z 2 4 y 1 3 x = − = − Then, which of the following points lies on the line L ?

1. (10, – 29, – 50)
2. (7, 15, 13)
3. (5, 4, 3)
4. (4, 22, 7)

Correct answer: (7, 15, 13)

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