Formulate the solution of the given question
Question- A battery has an emf of 15.0 V. The terminal voltage of the battery is 13.4 V when it is delivering 16.0 W of power to an external load resistor R.
Part 1- What is the value of R?
Part 2- What is the internal resistance of the battery?
I need help to provide the answer in all steps of the above question.