Final answer:
The hospital is not likely to prevail in bringing an action against the shoe store to recover 5% of the proceeds.
Step-by-step explanation:
No, the hospital is not likely to prevail in bringing an action against the shoe store to recover 5% of the proceeds from the sale of the shoes. The modification made to the contract between the manufacturer and the shoe store effectively eliminated the provision for payments to the hospital's cardiovascular wing. The hospital's rights had not vested at the time the modification was made, and therefore, it does not have a legally enforceable claim.