If \(P=\left[\begin{array}{r} -1 \\ 2 \\ 1 \end{array}\right]\) and Q = [2 – 4 1] are two matrices, then (PQ)' will be :
1
\(\left[\begin{array}{ccr}4 & 5 & 7 \\ -3 & -3 & 0 \\ 0 & -3 & -2\end{array}\right]\)
2
\( \left[\begin{array}{rrr}-2 & 4 & 2 \\ 4 & -8 & -4 \\ -1 & 2 & 1\end{array}\right]\)
3
\( \left[\begin{array}{rrr}5 & 5 & 2 \\ 7 & 6 & 7 \\ -9 & -7 & 0\end{array}\right]\)
4
\(\left[\begin{array}{rrr}-2 & 4 & 8 \\ 7 & 5 & 7 \\ -8 & -2 & 6\end{array}\right]\)