Let bar(PR)=3hati+hatj-2hatk and bar(SQ...

Let `bar(PR)=3hati+hatj-2hatk and bar(SQ)=hati-3hatj-4hatk` determine diagonals of a parallelogram PQRS and `bar(PT)=hati+2hatj+3hatk` be another vector. Then the volume of the parallelepiped determined by the vectors `bar(PT),bar(PQ) and bar(PS)` is

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