\textbf{102--} The minimum value of the function $y = mx^2 - 12x + 5m - 1$ for $m = 2$ is the axis of symmetry of the parabola. What is $x$?
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\hspace{1cm} (1) $x=2$ \hspace{2cm} (2) $x=2.5$ \hspace{2cm} (3) $x=3$ \hspace{2cm} (4) $x=3.5$
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