Why do engineers build prototypes and what processes are used to design and build a prototype?
write at least one paragraph including evidence to support your claim.

In this stage of the process engineers takes some of their concepts from the previous step and make mock-up versions of them.  The goal of this stage is to learn how each concept solution will function in “real life” and how it interacts with the real environment.  This is also where a designer will start to determine which design concept will work the best.  These prototypes are designed to be crude, but functional enough to be educational to the designer.  The keyword here is “LEARN.” 

Designers don’t need to prototype everything, just the things they want to work!

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answer; i believe the answer is 80%, plz check first good luck;