软件架构作业参考：要求：请用观察者模式、适配器模式和迭代器三种模式，来实现第三个（下排一个）帧（fr a me）的状态变更导致第一个和第二个帧的状态的同步变更。-Software Architecture Job Reference: Requirements: with observer mode, the adapter mode and iterators three modes to achieve the state of the third (bottom row) fr a me