Question 1 Will it be profitable fo

Question 1 Will it be profitable for Company A to implement the project to revise the current
product?
Question 2 By how many percent must the annual sales of the revised product be reduced
before the project is no longer attractive to invest?
Question 3 How much will the profitability of developing and marketing the revised version
of the product be reduced, if the life span on the market is reduced from 6 to 5 years?