Hi:
To answer question #1, about where you find the Europe Product Exploration Analysis, you needed to create it in the previous exercise. If you did not use the name that was recommended, then you should find it under the name you used. Here's the Exercise where the exploration was created:
In the last exercise of Chapter 2 you are instructed to open the Europe Product Exploration Analysis, as shown below in the solution to the exercise (in b.3):
This exploration was saved in the previous exercise, entitled "Adding Analytics to an Exploration" here
Then, regarding #3, you need to click options on the TREEMAP visualization title bar:
In the screen shot from the solution, the treemap is in the lower corner on the right side of the screen shot. If you rearranged your visualization differently and you placed the treemap in a different place, then you need to look for the title bar on the treemap visualization and click Options there.
Cynthia