Please use any of the methods that we have developed during the...

Please use any of the methods that we have developed during the semester to prove whether each of the following arguments is valid or invalid. For each problem, please identify the method that you have decided to employ and make sure to show your work.

1.     Being undetermined is a sufficient condition for human behavior's being free. Also, the laws of subatomic physics are statistical only if human behavior is undetermined. And the laws of subatomic physics are statistical. It follows that human behavior is free.

2.     It is obvious that nuclear energy is needed. Nuclear energy is needed if and only if solar energy cannot be harnessed. And it is also true both that solar energy can be harnessed only if funds to do so are available, and that funds are not available.