Analysts from the Internet company of Exercise 7 are now concerned that customers who come directly to

Question:

Analysts from the Internet company of Exercise 7 are now concerned that customers who come directly to their site (by typing their URL into a browser) might respond differently than those referred to the site from other sites (such as search engines). They decide to block according to how the customer arrived at their site.
Here is a diagram of that experiment. Fill in the parts.