D7.1. Given the following values for P1, P2, and I,ALI, calculate AH2: (a) P₁(0, 0, 2), P₂(4, 2, 0), 2πa-μA-m; (b) P(0, 2, 0), P₂(4, 2, 3), 2πa.μA-m; (c) P₁(1, 2, 3), P2(-3, -1, 2), 2(-ax +ay + 2a₂)μA-m. Ans. -8.51ax + 17.01a, nA/m; 16ay nA/m; 18.9a, -33.9ay + 26.4a; nA/m D7.2. A current filament carrying 15 A in the a, direction lies along the entire z axis. Find H in rectangular coordinates at: (a) PA(√20, 0, 4); (b) PB(2, -4,4). Ans. 0.534ay A/m; 0.477a, +0.239a, A/m