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Programming Exercise 8.5 describes how to perform matrix addition. Suppose you have multiple processors, so you can speed up the matrix addition. Implement the following method in parallel.

Write a test program that measures the execution time for adding two 2,000 * 2,000 matrices using the parallel method and sequential method, respectively.

Write a method to add two matrices. The header of the method is as follows:

public static double [][] addMartix(double[][] a, double[][] b)

In order to be added, the two matrices must have the same dimensions and the same or compatible types of elements. Let c be the resulting matrix. Each element cij is aij + bij. For example, for two 3 × 3 matrices a and b, c is

Write a test program that prompts the user to enter two 3 × 3 matrices and displays their sum. Here is a sample run:

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