Which statements regarding straw$-$man architecture are true?$$ Straw$-$man architectures are continuously updated like all permanent EA artifacts Straw$-$man architecture is essentially an architectural draft of an EA artifact Straw$-$man architectures can be developed and used instead of actual EA artifacts Developing straw$-$man architectures requires significant time investments$$ Straw$-$man architectures facilitate early discussions of key architectural decisions with their stakeholders