For this case, what we are going to do is divide the profits in equal parts, beginning in the following way:
Nina and Phillip:
Nina: 1/2
Phillip: 1/2
Then, we have:
Phillip shared his half equally with his friends, Ezra, and Benjamin.
Therefore, we must divide Phillip's earnings by three:
(1/2) / (3) = 1/6
Finally:
Phillip: 1/6
Ezra: 1/6
Benjamin: 1/6
Answer:
Nina: 1/2
Phillip: 1/6
Ezra: 1/6
Benjamin: 1/6