Question: pls do it in java (SumColumns.java) Write a test program that first prompts the user to enter the dimension n of an n x n

pls do it in java

(SumColumns.java) Write a test program that first prompts the user to enter the dimension n of an n x n matrix, then asks them to enter the matrix row by row (with the elements separated by spaces). The program should then print out the sum of all the columns of the matrix.

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