Hello!
We have a table with size 3x3, right?
So, our matrix W will have the same order, look:
[tex]W=\begin{bmatrix}{w_{11}} & w_{12}{} & {w_{13}} \\ {w_{21}} & {w_{22}} & {w_{23}} \\ {w_{31}} & w_{32} & w_{33}\end{bmatrix}[/tex]
Knowing it, let's write the matrix with the values contained in the table:
[tex]W=\begin{bmatrix}{28} & {21} & {19} \\ {17} & {24} & {15} \\ {22} & {29} & {17}\end{bmatrix}[/tex]
According to the explanation, the element w31 will be 22.
