Working on chapter 16

Chapter16/Answers to Exercises/Ex__4_train_model.md

@@ -45,6 +45,6 @@ Epoch 10/10
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-This figure displays the classification accuracy of the CNN on the training images (*Accuracy*) and on the test images (*Validation accuracy*) after each of the 10 training epochs:
+This figure displays the classification accuracy of the CNN on the training images (*Accuracy*) and on the test images (*Validation Accuracy*) after each of the 10 training epochs:
 
 ![CNN training accuracy](training_accuracy.png)