Question: Define a function first _ rpt ( M ) which takes as input a NumPy matrix M , and outputs a matrix in which every

Define a function first_rpt(M) which takes as input a NumPy matrix M, and outputs a matrix in which every row of M has been replaced with the first row.
For example, the output of first_rpt(my_matrix), where my_matrix is given by
my_matrix=np.array([[1,2,3,4],[-5,-6,-7,-8],[1,5,2,3]])
should be the matrix
array([[1,2,3,4],
[1,2,3,4],
[1,2,3,4]])

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