C1_W2_Exercise2-6_Grading error

I passed all test cases. Only modified cells with None, Included #grade up to here but I still got 0.
Got these feedbacks;

Exercise 2
Failed test case: Determinant d has incorrect type…
Expected:
<class ‘float’>,
but got:
<class ‘NoneType’>.

Exercise 3
Failed test case: Object MultiplyRow has incorrect type…
Expected:
<class ‘function’>,
but got:
<class ‘NoneType’>.

Exercise 4
Failed test case: Object augmented_to_ref has incorrect type…
Expected:
<class ‘function’>,
but got:
<class ‘NoneType’>.

Exercise 5
Failed test case: Variable x_1 has incorrect type…
Expected:
<class ‘float’>,
but got:
<class ‘NoneType’>.

Exercise 6
Failed test case: Object ref_to_diagonal has incorrect type…
Expected:
<class ‘function’>,
but got:
<class ‘NoneType’>.

Hi @NANCY_ARMAH,

It looks like you’ve forgotten a “#grade-up-to-here” somowhere after the first exercise. Can you doublecheck it please?

Thanks,
Lucas

C1_W2_Assignment.ipynb (23.2 KB)

i have the “#grade-up-to-here” in all cells but still getting the same error