Klay and Aspyn love to play in the snow with their cousins Gage and Emma. They decide to have a contest to see which team can create the most snowballs in half an hour. Because Klay and Aspyn are younger, they are allowed a 4-snowball head start. Together they can make 2 snowballs every 5 minutes. Gage and Emma are older and can make 1 snowball every 2 minutes. Write a system of equations for this scenario.