If \(A = \left[ {\begin{array}{*{20}{c}}
1&5\\
6&2
\end{array}} \right]\) and \(B = \left[ {\begin{array}{*{20}{c}}
3&7\\
8&4
\end{array}} \right].A{B^T}\) is equal to
1. \(\left[ {\begin{array}{*{20}{c}}
{38}&{28}\\
{32}&{56}
\end{array}} \right]\)
2. \(\left[ {\begin{array}{*{20}{c}}
3&{40}\\
{42}&8
\end{array}} \right]\)
3. \(\left[ {\begin{array}{*{20}{c}}
{43}&{27}\\
{34}&{50}
\end{array}} \right]\)
4. \(\left[ {\begin{array}{*{20}{c}}
{38}&{32}\\
{28}&{56}
\end{array}} \right]\)
