Conditional Probability Practice Test

A music streaming service tracks whether a user listens to a curated playlist (event $C$) and whether the user upgrades to a paid plan that day (event $U$). The service suspects that curated playlists encourage upgrades. How does knowing that a user listened to a curated playlist ($C$ occurred) affect the likelihood that the user upgraded ($U$)?

An online retailer tracks whether a customer clicks on a product review section (event $R$) and whether the customer completes a purchase (event $P$). The retailer believes review readers are more serious shoppers. How does knowing that a customer clicked on reviews ($R$ occurred) affect the likelihood that the customer completed a purchase ($P$)?