We manage a mobile application with two key functionalities:

Functionality A: Uploading a video to cloud storage for sharing.

Functionality B: Creating or editing a video.

Users can access basic features for free or unlock all features with a paid subscription.

After analysing the behaviour of millions of users over an extended period, we have measured the probabilities of users starting a subscription and using functionalities A and B during their lifetime. The probabilities of all possible combinations of these events for a random user are summarised in the following table.

For example, we can see that there's a $12\%$ probability that a random user starts a subscription and uses functionality A and does not use functionality B during their lifetime.

Question $1$: Assuming that the probabilities reported in the table are exact, which of the following statements are correct for sure? Select all that apply.

$1)$ The probability of a generic user using functionality B is $40\%$

$2)$ Users who use functionality A always subscribe

$3)$ More than $40\%$ of subscribers use functionality B

$4)$ If functionality A were available to all users, we would probably have more subscribers

$5)$ Among subscribers, those who use functionality B are less likely to use functionality A than those who don't use functionality B

$6)$ Among subscribers, those who use functionality A are more likely to use functionality B than those who don't use functionality A

$7)$ Among the first $100$ installers on a given date, $8$ of them are users of both functionalities A and B

Question $2$: What is the probability that a subscriber uses at least one among feature A and feature B$?$ Insert the percentage in the box, rounding to the closest integer, but don't write the percentage symbol $(\%).$ Examples of accepted formats are $52$ and $3$ to indicate $52\%$ and $3\%,$ respectively.