Which of the following are true?

PWA Service Workers share the same Javascript API processing thread as the browser UI $($user interface$)$

The purpose of PWA "web manifest" files is to control how PWAs manage off$-$line resource caching

PWAs can provide most mobile "native app" benefits at lower expense and complexity compared to Android and IoS app development

Single Page Apps $($SPAs$)$ are tending to replace the former niche held by Progressive Web Apps $($PWA