please answer all parts and show your work

Question 10: You are a stock analyst discussing dividend forecasts with the CFO of Plutonix Corporation (PLX). She makes the following comment: "We expect to continue to pay the current $4.25 annual dividend for the next 3 years. However, starting in Year 4 we plan to reduce the dividend to $3.75 in order to invest in new projects. We predict this will result in a growth rate of 3%. We do not anticipate any changes to our cost of equity capital (Re), which is currently 8%." What is the value of PLX stock? What are the advantages and disadvantages of the Dividend Discount Model (DDM)