Polite letter writing

[Xinfu]

Are my sentences polite and do they befit the style that should be adopted by a student when he writes to a teacher?

Dear Prof L,

Thank you for nominating me leader of a mentor group. I appreciate it. But the problem I have is, I do not know those in my group very well, so I hope to hand over/shift the responsibility of so difficult a task to others, who would definitely be more competent than I am. I apologise for causing all the trouble. Thank you.

Yours sincerely,
Paul Auster

[Rusty]

Your sentences are indeed polite. Using 'suit' would be better than 'befit'.

Surrender the responsibility
Hand over the responsibility
Turn over the responsibility
Abdicate the responsibility


There should not be a comma after 'others'.

[Xinfu]

Thank you~