1. c (5 points) Use the resistances from the first line of Table P1-1 in the circuit of Figure P1-1. Find the Thevenin equivalent resistance seen by the input to the op amp circuit (i.e. the 1.5 V battery) for each resistance value. Measure the voltage and current at the input. Then add a 1 ko2 resistor in series with the battery and again measure voltage and current at the input. Use this data to find the Thevenin equivalent. Calculate the nominal Thevenin equivalent input resistance, assuming an ideal op amp, and compare to your measured value