Please use any of the methods to prove whether each ofthe following arguments is valid or invalid. For each problem,please identify the method that you have decided to employ and makesure to show your work.
1. It is obvious that nuclear energy is needed. Nuclear energyis needed if and only if solar energy cannot be harnessed. And itis also true both that solar energy can be harnessed only if fundsto do so are available, and that funds are not available.
