0/1 point 5. A matrix is square if it has the same number of rows and columns. The diagonal of a square matrix consists of those items in the matrix whose row and column indices are equal. Finally, the trace of a matrix is the sum of the items on the matrix's diagonal. Write a function trace (matrix) that takes a square matrix matrix and returns the value of its trace. Then use your implementation of trace and compute the value of trace (my_matrix) for instances of my_matrix as defined by the code snippet provided in the previous question. As test, trace(my_matrix) should return 30 when trace (my_matrix) has five rows and columns. Enter in the box below the value returned by trace (my_matrix) when trace (my_matrix) has twenty five rows and columns. 0 ! Incorrect