Forces 2hati+hatj, 2hati-3hatj+6hatk and...

Forces `2hati+hatj, 2hati-3hatj+6hatk and -hati+2hatj-hatk` act at a point P, with position vector `4hati-3hatj-hatk`. Find the vector moment of the resultant of these forces about thepoint Q whose position vector is `6hati+hatj=3hatk`

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