Вот пример ответа на письмо Линды, соблюдая указанные вами правила оформления:
From: Russian_friend@mail.ru
To: Linda@mail.uk
Subject: Re: Hobby
Dear Linda,
Thank you for your letter! I appreciate your sharing about your hobby. In my free time, I enjoy reading books, especially fantasy novels. My parents are very supportive and encourage me to read more. I usually spend about two hours a day on this hobby. It helps me relax and explore new worlds.
Looking forward to hearing from you soon!
Best wishes,
[Ваше имя]
В этом письме ответили на все три вопроса Линды и соблюдены правила оформления.