Answer
$A=\begin{bmatrix}
4.5 & 6 & 2.5\\
5.5 & 8 & 2.5
\end{bmatrix}$
$B=\begin{bmatrix}
4 & 6.5 & 3.25\\
5 & 8.5 & 3.25
\end{bmatrix}$
Work Step by Step
Rewrite the costs for city A and city B in matrix form, where each row represents one channel and each column represents the time of day.
$A=\begin{bmatrix}
4.5 & 6 & 2.5\\
5.5 & 8 & 2.5
\end{bmatrix}$
$B=\begin{bmatrix}
4 & 6.5 & 3.25\\
5 & 8.5 & 3.25
\end{bmatrix}$
