An analog-circuit designer requires a +5 V power source from which to run a small amount of digital logic requiring 20 mA at +5 V. The analog system uses ±15 V supplies which are quite well-regulated (that is stable over time and temperature and reasonably independent of load). Suggest a simple op-amp circuit, using a resistor network operating at 0.5 mA, to do the job. If the op amp requires a bias current of 2 mA from its supplies at no load, what is its total power dissipation when fully loaded at the max-imum current required by the logic?