If Z1 = 2 + i and Z2 = 3 - 4i and \(\frac{\overline{Z_1}}{\overline{Z_2}}\) = a + bi then the value of -7a + b is (where i = \(\sqrt{-1}\) and a, b ∈ R)

1
1
2
-1
3
\(\frac{-3}{25}\)
4
\(\frac{-9}{25}\)

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