Where's the answer to this question: Please determine and define what interest, if any, does each of the following have in Blackacre: Carl?

Where's the answer to this question: "Please determine and define what interest, if any, does each of the following have in Blackacre: Carl? Darrel? Sam? Lilly? Alice? Please explain your reasoning, using irac, on how you have come to your conclusion". This is why I purchased my premium membership with course hero.