2.103 Using offset-nulling facilities provided for the op amp, a closed-loop amplifier with gain of +1000 is adjusted at 25°C to produce zero output with the input grounded. If the input offset-voltage drift is specified to be 20 µV/°C, what output would you expect at −40°C and at 85°C? While nothing can be said separately about the polarity of the output offset at either −40 or 85°C, what would you expect their relative polarities to be?