Course 1 Week 2 NameError: name 'load_dataset' is not defined

NameError: name ‘load_dataset’ is not defined

Logistic Regression with a Neural Network Mindset

How to fix with problem?

Because of this i got many other similar problems:

NameError: name ‘plt’ is not defined
NameError: name ‘train_set_x_orig’ is not defined
NameError: name ‘np’ is not defined
NameError: name ‘w’ is not defined
etc…

You need to run all cells before that cell.