C1W4 Exercice5 - L_model_forward()

Hi I am struggling to finish the L_model forward () implemantation.
I think my AL, cache are NOT ok. I have
1 test passed and 2 tests failed, with Wrong shape for variable 0 and Wrong shape for variable 1

Here is my implementation:
AL, cache = linear_activation_forward(A_prev, parameters[‘W’ + str(L-1)], parameters[‘b’ + str(L)], activation = “sigmoid”)

any hint of what went wrong?

I think I got it: my “A…” is not the right one and one of my “L” is not ok