1. A construction project is planned entirely before coding begins. The schedule, budget, and scope are baselined, and any requested changes must pass through a formal approval process. Which of the following statements are true of the waterfall approach? (Please indicate all that apply. Incorrect answers will be negatively marked.)Select one or more: Scope flexibility is a core feature Changes are discouraged unless formally approved Comprehensive planning at the start guides the project lifecycle Work is delivered in iterative sprintsIt emphasises sequential phase completion