Forms 8a, 8c. Future forms

For practicing:
https://www.englisch-hilfen.de/en/exercises/tenses/future.htm;
https://www.english-4u.de/en/tenses-exercises/future.htm;
https://www.ego4u.com/en/cram-up/grammar/future-mix/exercises;
https://www.test-english.com/grammar-points/b1/future-forms/;
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php.