Power consumption of computers is an important issue, and the vast majority of computers can be replaced by their low-power counterparts without sacrificing computing capabilities. Advantages of low-power computers include smaller fan, lower noise, longer component life, lower power bill, and lower cooling cost. In this assignment, you have to select a power supply unit (PSU) for a desktop computer that consumes approximately 30 watts at idle time and 60 watts at full load. The main criteria for selection is to minimize wastage of power. Provide a detail rational for your selection.