Age Problem | By Julian

Today we had done a rich task a rich task is when you are finished eney other task like a bonus. You have to workout how old the people are and this is what we had to figure out. Malcolm was 3 times the age of Peter but was 4 years younger than Jack. Jack was 10 years older than Craig, who was 4 times the age of Richard. Richard is 15. How old is everyone else?