A platinum resistance thermometer is utilised to continuously measure the temperature in the production of granular fertiliser. The resistance of the thermometer needs to be measured so that the corresponding temperature can be determined. The nominal resistance of the thermometer at 0C is 450 . Please complete the tasks below: (1) Design a null-type bridge circuit for the measurement of the resistance of the thermometer and explain how the resistance can be measured using the circuit. (2) Designadeflection-typebridgecircuitforthemeasurementoftheresistanceofthethermometerand explain how the resistance can be measured using the circuit. (3) Compare merits and demerits of the two circuits