Help please A. Explain why testing a solution based on the criteria and constraints of the design problem is key part of the engineering design process

B. Models are important tools for both scientists
and engineers. How do scientists and engineers
differ in the way that they use models in their
areas of study?

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.