Answer 1

Mailto: [e-mail]

Or report via in-app option bug report.

Answer 2

Earn sufficient bits.
Tap on that option ,and press ok. you see, it will deduct required bits and unlock coach.. You can try to solve it.
edit:
Tamim Moh'd did you see there pro pop-up?
just tap on code coach, what option box like,
you see?

Answer 3

ALTER TABLE cities
ADD AttractivePlace VARCHAR;

UPDATE cities SET AttractivePlace = 'Belem Tower'
WHERE name = 'Lisbon';

UPDATE cities SET AttractivePlace = 'Plaza Mayor'
WHERE name = 'Madrid';

UPDATE cities SET AttractivePlace = 'Eiffel Tower'
WHERE name = 'Paris';

SELECT * FROM cities