1. Write the required Java code to implement only the two classes Activity and Task using the composite pattern. Assume that the abstract class SoftwareLifecycle exists and the methods Display() and CalculateDuaration() are abstracts. The Display() method displays the name of the task or the name of all the components for one activity. The CalculateDuration() method returns the task duration or the total duration of all the components for one activity.

The remaining methods manage the components data structure.

Project Manager SoftwareLifecycle #name: String #duration: int +Display() +Calculate Duration(): int steps Task Activity +Display() +Calculate Duration(): int +Display() +AddStep(step : SoftwareLifecycle) +RemoveStep(step : SoftwareLifecycle) +GetChild(index: Int) +Calculate Duration(): int