Two power systems have the transmission matrices below. If these systems are cascaded, determine their equivalent transmission matrix:

\[
\left[T_{1}ight]=\left[\begin{array}{cc}
1 & j 2 \\
0 & 1
\end{array}ight],\left[T_{2}ight]=\left[\begin{array}{cc}
1 & 0 \\
j 2 & 1
\end{array}ight]
\]

1) \(\left[\begin{array}{cc}-3 & j 2 \\ j 2 & 1\end{array}ight]\)

2) \(\left[\begin{array}{cc}5 & j 2 \\ j 2 & 1\end{array}ight]\)

3) \(\left[\begin{array}{cc}2 & j 2 \\ j 2 & 2\end{array}ight]\)

4) None of them