What type of ownership interest is appropriate in each of the following?
a. A father wants to provide for his daughter during her life but wants to ensure that her younger husband (i.e., the son-in-law) does not inherit the property if he survives her.
b. A married couple buys a home and wants to make sure that whoever survives obtains sole ownership of the property.
c. Grandparents want to ensure that the family vacation home will be available for use by all of their children and grandchildren during their lifetimes.