Digital Orrery - All the files (write-up, Processing main program, and Java class files that you need to modify) are attached. Please place all your files in a single directory, zip it up.

Matrix.java

Orbit.txt

Orbiter.java

UndefinedMatrixOpException.java

* A simple m x n matrix class TODO All of the methods currently just return default values. You need to make them match the Javadoc comments. *Cauthor YOUR NAME HERE * @version Sept. 2017 public class Matrix private int m, n; private double[] [] M; public Matrix (double [array) f M = array; m = array.length; n - array[0].length; * @return The number of columns in the matrix. public int nCols) return 0;h * Creturn the number of rows public int nRows ) return 0; *param i *param j * return The entry at row i column j. public double entry (int i, int j) f return 0; Computes the dot product of this matrix with the parameter that. (Return value is this . that) param that The matrix to apply this matrix to. because the dot product is not defined * Recall that the dot product is the typical matrix multiplication. * @throws BadDimensionException If this.nCols() != that.nRows() *return The dot product of this matrix with that. public Matrix dot (Matrix that) throws UndefinedMatrixopException [ return null