How do I submit the previous version of Programming exercise in Week 3?

Course Q&A Deep Learning Specialization Improving Deep Neural Networks: Hyperparameter tun
21

Thank you Paul. It would be great to have a bit of an explanation about this in the course!

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Thank you, Paul. It makes sense now!
Maybe as another hint, it would be useful to point to how TF applies the activation (i.e. along which axis)