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07.1. Given the following values for P₁, P2, and 1₁AL₁, calculate AH₂:
(a) P₁(0, 0, 2), P₂(4, 2, 0), 27a-A-m; (b) P, (0, 2, 0), P₂(4, 2, 3), 27a₂A-m;
(c) P₁(1, 2, 3), P₂(-3,-1, 2), 27(-a, +a, +2a₂)µA-m.

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