def evaluate_model(model, scaled_test_images, test_labels):
    """
    This function should evaluate the model on the scaled_test_images and test_labels. 
    Your function should return a tuple (test_loss, test_accuracy).
    """
    test_loss,test_accuracy = model.evaluate(scaled_test_images,test_labels, verbose=2)
    return (test_loss,test_accuracy)