design a circuit that will provide control for an electric(room) heater. the heater draws 5A from a 12V source. dont connect most componets in line with the heater. the circuit should have a thermistorthat gives a linear out of 100-200Ω for temperature reading of 0-100 deg. let the circuit use the thermistor to control the heater so that it provide a constant temperature that can be selected between 50-80deg.