A total of 49 year-olds will participate in sports tournaments. They have the opportunity to apply for up to three sports: soccer, floorball and volleyball. According to the following claims, find out how many pupils have entered the tournament in football. • Everyone participates in at least one sport. • 12 pupils want to participate in more than one sport. • Just two sports will be run by 8 pupils. • 2 more pupils have entered the football tournament than for the floorball. • A total of 19 pupils will play volleyball. • Those who chose both football and volleyball are 6 in total. • Those who have chosen both football and floorball are one more than those who have chosen both football and volleyball.