Final answer:
Michelle will recognize a gain of $50,000 on the building in the complete liquidation, and her tax basis in the building will be $100,000.
Step-by-step explanation:
In the complete liquidation, Michelle will recognize a gain of $50,000 on the building. This is calculated by taking the fair market value of the building ($200,000) minus her tax basis ($100,000). Her tax basis in the building after the complete liquidation will be the same as the tax basis of the Pennsylvania stock she exchanged for the building, which is $100,000.