Hello,
my name is Liliana, i have over ten years of experience as a designer, and what i like most is to illustrate, that's why i like this project.
Please, visit my Freelancer portfolio https://www.freelancer.com/u/webpolis.html
to see some of the illustrations and designs i made, in order to evaluate my work.
I can send you more samples, if you want to.
I use Illustrator for this kind of projects, i can deliver you the illustrations as vector format,
and also saved as any other format you may need, like JPG or transparent PNG, for example.
I found this project really enjoyable and interesting, and i would like to create 31 originals, clear and professional symbol illustrations.
Hope we can work together, please, contact me if you want to talk about the project, or if you want to see some more of my work.
Best regards.
Lili.