1. Josh picked up the photo. "Your two teenage boys, eh? Fine looking kids," he commented. "How old are they?" "A teaser for you," Jorg replied. "There's also Rosa, our youngest child. The sum of their three ages is one less than three times the age of the second child, and Rosa is two years younger than half the age of the eldest." What were the three ages?

Rosa aged 9, the boys aged 14 and 19

Rosa aged 7, the boys aged 13 and 18

Rosa aged 5, the boys aged 11 and 15