C1: (7t, 2 + t, 4 – 3t), for t E (-∞,0) and Lz: (3 – s, 5,6 + 2s), for s e (-00, 00) L1: (1 + t,1 – t, 3 + 2t), for t e (-∞, 00) and L2: (s – 5, s – 1, 2s – 9), for s e (-0,00) O L;: (7 – 15t, 3 + 5t, 2 + 20t), for t e (-00, 00) and L2: (10 + 3s, 6 – s, 14 – 4s), for s E (-0,00)

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