https://colab.research.google.com/github/csaybar/DLcoursera/blob/master/Neural%20Networks%20and%20Deep%20Learning/week3/Planar%20data%20classification%20with%20one%20hidden%20layer/Planar%2Bdata%2Bclassification%2Bwith%2Bone%2Bhidden%2Blayer%2Bv5.ipynb