Which of the following statements refers to personal growth in Barry Boehm's study on team motivation?
1) The team clearly understands the work of the project and how the results will add value to the business
2) The team members need to feel that they are part of a team, not just a group of people working next to each other
3) The team needs to be challenged throughout the project in ways that make sense
4) Every project should help to build the skills of each team member, especially when managing technical people and subject-matter experts