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using C++ Declare a 2-D array X that can store floating point number and can store a maximum of 10 rows and 10 columns. Now use two other variables: m and n (both integer) to represent the actual number of rows and columns of the matrix X. Get used input for m and n. Then write an input statement to get the values of X from user. The program must compute the sum of each row and sum of each column, and display them.