input: def predict_annual_income(model, age, education):
      """ Given a Keras model trained to predict annual income based on age and education level,
      this function will predict the annual income for a given age and education level.
      >>> model.predict(np.array([[50, 3]]))
      array([[80000]], dtype=int32)
      """
      return model.predict(np.array([[age, education]]))
output:     return model.predict(np.array([[age, education]]))