Which of the following are true about the structure of a Declarative Pipeline?

Any Pipeline DSL code that Implements complex computational tasks must be located outside any stage block.

Steps are the logical segmentation of a Pipeline; they contain stages that define actual tasks.

Stages are the logical segmentation of a Pipeline; they contain steps that define actual tasks.

Each pipeline must have a global agent specification.

All stages in a Pipeline must execute on the same type of agent.