The differences between the roles of the Product Manager, the Product Marketing Manager and the General Manager in an organization

What are the differences between the roles of the Product Manager, the Product Marketing Manager and the General Manager in an organization?
Draw Sigmoid Curve. On the same curve, plot the steps that are upstream and downstream in a product life-cycle. Explain your response.
What is the difference between the Waterfall and Agile development methods, and when/why would firms choose one over the other?
Complete the table below. Then draw the burn down chart with the completed data.

Day

Done

Remaining

Ideal Done Per Day

Ideal Velocity

Initial value

0

0

1

0

2

5

3

3

4

15

5

10

6

8

7

13

8

24

9

28

10

10

11

15

12

13

13

3

14

2

15

1