Choose the correct options to describe the extracts from the letters and emails

I have to go to my music lesson now but do let me know what you decide to do.

This is the [beginning|ending] of a(n) [formal|informal]email [of application|giving information|to a friend|of invitation].

I am writing with regards to your advertisement in the Western Chronicle this week. The position of office clerk appeals to me a great deal, and I would like to be considered for the post.

This is the [beginning|ending] of a(n) [formal|informal]letter [of application|giving information|to a friend|of invitation].

If you require any further information, please do not hesitate to contact me.

This is the [beginning|ending] of a(n) [formal|informal]letter [giving information|of application|to a friend|of invitation].

We regret to inform you that Saturday's performance of La Bohème has been cancelled due to unforeseen circumstances. We are very sorry for the inconvenience this will cause you.

This is the [beginning|ending] of a(n) [formal|informal]letter [of application|giving information|to a friend|of invitation].

Thanks for the letter inviting us to your birthday celebration.

This is the [beginning|ending]of a(n) [formal|informal] reply to a letter [of application|giving information|to a friend|of invitation].

It's such a shame. Next time, let me know in advance! Until then, take care.

This is the [beginning|ending] of a(n) [formal|informal]letter [of application|giving information|to a friend|of invitation].