13. On the right side of the screen is a voltmeter. With the voltmeter, repeat what you just did with the E eld sensor, with one very important exception: Notice the button on the voltmeter that has a PENCIL. When you have the voltmeter at each distance, click this button. Doing so will record the potential V and draw a green line I" [m] - VW] on the screen. Fill in the ' 1 ' table at the far right. Then 2 draw a simple sketch of 3 the charge and the green 4 lines. Don't bother putting 5 values in; just get the 6 general shape of the lines. 7 8 14. Clear the screen. Make sure the _ Values and _ Grid boxes are checked. Place a red +1 nC charge on the left and a blue - 1 nC charge on the right, 2 m apart. 15. In the space to the right, draw those charges and the E field lines that surround them. Be sure to include arrows on the E field lines to show their directionality. 16. Drag an E field sensor around many points of this charge conguration, observing how the value on the sensor changes, as well as what happens to the red arrow. What do you observe about ...? A. the sign [+ or -] of E field, as reported by the sensor? B. Is there any point on the screen where the E field is zero? If so, describe the point[s]