Explanation The relationship between F1 and F2 is that they are mutually exclusive and dependent features. This means that the customer can only choose one of them, and the choice depends on their charging needs. If the customer wants to have their mobile device fully charged, they will select F1. If the customer only wants to have their mobile device partially charged, they will select F2 and specify the amount of charge they need. The customer cannot select both F1 and F2 at the same time, nor can they select neither of them. Therefore, F1 and F2 depend on each other and on the customer's preference. References: CBAP / CCBA Certified Business Analysis Study Guide, 2nd Edition, page 47 Business Analysis Professional Resources | IIBA, under Business Analysis Body of Knowledge (BABOK ) Guide Requirements Relationships - Business Analyst Learnings, under Mutually Exclusive Relationship