A music streaming app uses the function: to assign a mood score based on the number of hours a user…

A music streaming app uses the function: $f(x) = \tan^{-1}\left(\frac{x}{10}\right)$ to assign a mood score based on the number of hours a user listens to music per week. Let the listening times (in hours/week) of two users, User A and User B, be 6 and 8 respectively. Compute the combined mood score of user A and user B, that is, $f(6) + f(8)$. (Application)