$\"\"$

\

The matrices are $\"\"$ , $\"\"$ , and $\"\"$ .

\

Find the product $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$ (Multiply the two matrices)

\

$\"\"$ (Simplify)

\

$\"\"$ (Substitute $\"\"$ )

\

$\"\"$ (Property: $\"\"$ )

\

$\"\"$

\

$\"\"$ (Simplify)

\

The simplified product matrix is $\"\"$ .

\

$\"\"$

\

$\"\"$ .