Question: solve Ax=b code with Jacobi way

Hi, i want to solve the Ax=b with jacobi method and 4 Iteration, A=Matrix(3, 3, [1, 2, 1, 2, 1, 3, -1, -3, 4]) and b=[8, 13, 5]. 

i want to write a code with for or if or while. tnx

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