Q1. I tried "intersect" but it left out large portions of the map area... predictably, so i then tried "Update" which gave me something much closer to what the directions to use "Union" had us all end up with.
Q2. I used the "Erase" tool because the purposes of none of the other made any sense for 'eliminating' the area in question. Erasae was the only option that made sense.
Q3. There were 79 features in this layer and (since we were instructed to find an area but not given a scale to use, i chose sq. miles) The largest area was 0.4127 square miles. The smallest area was 0.00012 square miles.
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