What are ways marketing executives manage a product's life cycle?

Each bullet is its own question. Each question must be either 2 paragraphs or 200 words

In your opinion, which of the seven stages in the new product development process is most important and what reasoning led you to your conclusion?
Select a product with which you are familiar. What stage is this product at in the product life cycle? Provide rationale for your answer. Based on your knowledge of the product life cycle, what types of changes will occur to this product as it continues through the product life cycle? How will this affect marketing of the product?
Select a product or service. Then, select three different organizations that provide your selected product or service and compare the prices associated with it. What is the difference between the prices among the different organizations? What is the rationale for this difference?
What are ways marketing executives manage a product’s life cycle?
In what ways do pricing constraints impact price setting?

What are ways marketing executives manage a product’s life cycle?