The variation of resistance, R ohms, of an aluminium conductor with temperature 0°C is given by dR de aR, where a is the temperature coefficient of resistance of aluminium. (a) If R Ro when 0 = 0 °C, prove the equation R Roea is true. (b) Given that a = 43 x 10-5 °C, determine the resistance of an aluminium conductor at 40°C, when its resistance at 0°C is 34.00.