Prog Assn: Convolution_model_Step_by_Step_v1: Error Make sure you include stride in your calculation

Hi,
I am in the Programming Assignment: Convolutional Model, Step by Step and stuck in Exercise 3 - conv_forward.

At the time of test assertion, I get the following error:
First Test: Z’s mean is incorrect. Expected: 0.5511276474566768
Your output: 0.5329033220060434 . Make sure you include stride in your calculation

Can you please assist where in the for loops do I need to incorporate “stride”?
Is it in a_slice_prev assignment statement?

Thanks,
Amit.

Please check this guide.

Thank you, thank you and thank you.
I missed incorporating the stride while formulating for vert_start & horiz_start. This works now.

Regards,
Amit.