1. If you performed this experiment at one of the Earth's magnetic poles, at what angle from the horizontal would you be holding your smartphone at the end of step 6 in section 2.2? 2. Explain why the calculation in Step 14 in section 2.2 is correct. (Hint: what if the Earth's magnetic eld was purely vertical at your location? What if it was 1 degree away from vertical?) 3. Refer to Figure 1. If an identical bar magnet was added to the gure above the bar magnet on the right, there would be an attractive force between the south pole of the added magnet and the north pole of the rst magnet. If an identical current loop was added to the gure above the current loop on the left, would the two current loops feel any force? If so, would it be attractive or repulsive