Stuck finding love

"The inheritance for each of your siblings and cousin is 100 million dollars," he says in a monotone voice.

"Excuse me? There must be a mistake, my nana lived in a small and tun down cottage house with a crappy car, there's no way she had that much!" I explain to the lawyer.

"I'm afraid your mistaken miss," he says as he re-scans the will, "your Grandmother had $500 million in her savings."

I stare in awe at the man in front of me, this must be a dream. It had to be. Nana never had anything expensive, ever.

"But she did leave very strict instructions as how to get your inheritance, almost like, rules. Before you get the money." He explains.

"Rules?"

"Yes. Rules."

"I don't understand," I say in confusion as I try to proses the info he gave me, "what kind of rules are they?"

He hands me an envelope and says calmly, "your Grandmother wanted you, your siblings, and your cousin to go on a summer long Cruise, already picked out, payed for, and chosen, but on the cruise you all have a task, or multiple tasks, that you are required to do over the summer."

"And if we don't complete the tasks? Then what? You wont give us our inheritance?" I ask in disbelief.

"That is correct Miss. Kings, the money for you would be split among the heirs that completed their tasks."