Lucy, Alicia, and Monica jointly purchased an estate for $108,000. Their individual investments in the estate were in the ratio of 4:3: 2, respectively.
a. Calculate their individual investment amounts.
Lucy: ____
Alicia: ____
Monica: ____
Round your answers to the nearest cent
b. Each of them decided to invest an additional $4,000 to develop the estate into a small family resort. What is the new ratio after the additional investment?