I got 6 + 12 i.

I think the area would be 16.

After graphing, you can split the triangle made by the points equally into two triangles, then calculate the area of both. The area of each respectively is 8, so the total area would be 16.

1st question: #1 is correct

2nd question: #3 is correct

3rd question: #3 is correct

You can reread the sentences out loud and see which one sounds best, that's quite helpful