What color is burgundy red and yellow when you mixed them together

Dobrý den, nevím přesně, ale možná je to pop a další

Maybe ech person had their own set of drawing skills like maybe one person could only do contrasting and the other could do realistic detailing   

Yes because in graphic design you add elements of art into one piece and/or program. although, you place together graphic designs on a computer,  you still have to know about the principles of design which is included in art.