A matrix is an arrangement of numbers. The numbers are arranged in rows and columns. An example of a matrix is as: _____________________________ _____________________________ col1 col2 ______________________________ row1 4 5 _______________________________ row2 7 9 _______________________________ _______________________________ The first element ( 4 ) of the matrix is the element of the first row and first column. Similarly the last element ( 9 ) of the matrix is the element of the last row and last column. The number of r...