The (t)-parameters of the two-port networks (N_{mathrm{a}}) and (N_{text {b }}) in Figure P17-23 are [ left[boldsymbol{t}_{mathrm{a}}ight]=left[begin{array}{rr}

Question:

The $t$-parameters of the two-port networks $N_{\mathrm{a}}$ and $N_{\text {b }}$ in Figure P17-23 are
\[
\left[\boldsymbol{t}_{\mathrm{a}}ight]=\left[\begin{array}{rr}
40 & 15 \\
5 & 40
\end{array}ight] \text { and }\left[\boldsymbol{t}_{\mathrm{b}}ight]=\left[\begin{array}{cc}
5 & 2 \\
2.5 & 5
\end{array}ight]
\]
Find the $t$-parameters of the cascade connection.

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