Explain and discuss why engineers usually want the minimum variance unbiased estimator (mvue). what benefits are achieved by using the mvue in making engineering decisions, and what risks or impacts might be seen if another estimator is chosen at times? try to use hypothetical examples to illustrate your thinking.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?