Write a function \color{red}{\verb|trace(matrix)|}tr ace(matrix) that takes a square matrix \color{red}{\verb|matrix|}matrix and returns the value of its trace. Then use your implementation of \color{red}{\verb|trace()|}trace() and compute the value of \color{red}{\verb|trace(my matrix)|}trace(my matrix) for instances of \color{red}{\verb|my_matrix|}my_mat rix as defined by the code snippet provided in the previous question.