A structural engineer discovers that the concrete being used on a new highway overpass does not meet the minimum compressive strength specified in the design. When they report this to the project manager, they are told to "ignore it, the safety factor will cover it, and we can't afford delays." Apply the NSPE Code of Ethics to determine the engineer's responsibility.

A freelance mechanical engineer emails a client offering to design a custom HVAC system for $15,000. The client replies, "I accept your offer, but only if you can complete it within 3 weeks instead of the 6 weeks you proposed." Does a legally binding contract exist? Analyze the essential elements.