By Letter of motivation, Colons

See what you think of these revisions, Andrea Co. (Reminder: type two spaces after a period and after a colon.) I am writing to express my great interest in applying for the preparatory PhD program in the X Institute in Berlin. I studied microbiology, from 1997-2002, at the University of R in...

Cookey, Should i write 'Letter of motivation' on top in bold letters and maybe underlined? No. Do i sign the letter personally later? If should i leave some spac between Yours respectfully and my name? Yes, sign it personally, so leave appropriate space. And where do i insert the date...