Who is responsible for the Project Plan and Gantt Chart in Scrum?

Who is responsible for managing ROI in Agile projects?

A software company is developing an accounting software system to market to customers. The team has been working on the project for six weeks and has great velocity. One of the major stakeholders approached the scrum master and asked for a bi-weekly status report because they feel they are not being properly updated. How should the scrum master respond to this request?

The product owner should spend at least 3 hours per day with the development team?

A software development team is working in an environment in which increased competition, demanding customer expectations, and new technological developments pose significant challenges. How should the team plan improvements to their product?