i found error for compute cost and compute gradient.
This means your code in your notebook for these functions does not work correctly.
Whenever you get a check implementation feedback on the grader output, it states that although you might have passed all the test in the assignment, the way you have wrote your codes to get the expected output is not matching with the autogravder. So kindly go back and check in your assignment from start if you have not hard coded any of the codes, or added any extra code lines other than which were given at the start of your assignment.
Let us know if you still find difficulty in finding the correct implement. I sincerely suggest you to start redoing the assignment with a fresh copy and at the end compare with your previous copy to know where you might have gone incorrect.
Regards
DP
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