Answer:
Invalid
Explanation:
In Calhoun's will, his daughter Mary is only entitled to the willed property for the duration of her life, and after her death, the property is passed along to her children. Regardless of the fact that Mary is still childless, she is still 30, meaning that she still has the ability to give birth to children. Thus, any deed from Mary to the buyer is invalid. Outright selling rights were not transferred to her, but the will transfer stopped at her children, hence they are the only ones that can sell it outrightly in this case.
