Part 5: Two Dimensional Sequences solution

Define a class Matrix by extending Sequence. Matrix represents a two dimensional array of integers, and

defines the following methods:

```

class Matrix extends Sequence {

// constructor for creating a matrix of specific number of rows and columns

Matrix(int rowsize, int colsize);

void Set(int rowsize, int colsize, int value); // set the value of an element

int Get(int rowsize, int colsize); // get the value of an element

Matrix Sum(Matrix mat); // return the sum of two matrices: mat & this

Matrix Product(Matrix mat); // return the product of two matrices: mat & this

void Print(); // print the elements of matrix

}

```