Hi guys, i am just attached to 1 company and being told to design an artworks for billboard . i wish to know that how to calculate the DPI or PPI that should use for printing . Let say i need to print in 11 feets x 10 feets billboard ...How many DPI/ PPI should i use for this ? Please teach me the way to calculate this.

2) As an amateur of graphic designer, what should i learn for initially ?

3) Is there any rules to follow for designing, billboard, poster, banner...etc (POSM)

(for your information, i am only a fresh graduated student in tourism study that joining into marketing field, i have a lot of "dunno" for marketing stuffs)