Answer
(a.) Size $=3\times 3$.
(b.) Element is $=6$.
Work Step by Step
(a.)
The size of the matrix is equal to number of rows multiply by number of columns.
The given matrix is
$\begin{bmatrix}
6& 3&2\\
1 & 0& 0 \\
-3& 0 & 6
\end{bmatrix}$
Number of rows $=3$.
and number of columns $=3$.
Hence, the size of the matrix is $3\times 3$.
(b.)
$(3,3)$ is a position at row $3$, column $3$.
The element at row $3$, column $3$ is $6$.
Hence, the element is $6$.
