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Let `P(1, 2, 3)` be a point in space and Q be a point on the line `(x-1)/(2)=(y-3)/(5)=(z-1)/(3)` such that PQ is parallel to `5x-4y+3z=1`. If the length of PQ is equal to k units, then the value of `k^(2)` is equal to

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