Find the volume of the parallelepiped with adjacent edged PQ, PR, and PS.
Volume = PQ . (PR x PS)
The Attempt at a Solution
I first found the vectors PQ, PR and PS. Then I did the cross product of PR x PS and then did the dot product of PQ (dot) PR x PS. I got an answer of 6, but the answers in the back of the book says 16. Did I do it wrong? or is the book wrong?