Question: Three point charges Q1 = 1mC, Q2 = 2mC, and Q3 = 3mC are, respectively, located at (0, 0, 4), (2, 5, 1), and (3,

Three point charges Q1 = 1mC, Q2 = –2mC, and Q3 = 3mC are, respectively, located at (0, 0, 4), (–2, 5, 1), and (3, – 4, 6).
(a) Find the potential VP at P(–1, 1, 2).
(b) Calculate the potential difference VPQ if Q is (1, 2, 3).

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