This question involves a two-dimensional array of integers that represents a collection of randomly generated data. A partial declaration of the Data class is shown. You will write two methods of the Data class.

public class Data

{

public static final int MAX = /* value not shown */;

private int[][] grid;

/** Fills all elements of grid with randomly

* generated values, as described in part (a)

* Precondition: grid is not null.

* grid has at least one element.

*/

public void repopulate()

{ /* to be implemented in part (a) */ }

/** Returns the number of columns in grid that are in

* increasing order, as described in part (b)

* Precondition: grid is not null.

* grid has at least one element.

*/

public int countIncreasingCols()

{ /* to be implemented in part (b) */ }

// There may be instance variables, constructors, and methods that are not shown.

}

Part a

Write the repopulate method, which assigns a newly generated random value to each element of grid. Each value is computed to meet all of the following criteria, and all valid values must have an equal chance of being generated.

• The value is between 1 and MAX, inclusive.
• The value is divisible by 10.
• The value is not divisible by 100.

Complete the repopulate method.