Answer:
Angel, Juan and Ricardo are brothers. During the month of August, his parents who live in Huancayo traveled to visit him. Angel arrives on August 5 and will stay until before August 12. Juan goes on vacation on August 2, he only has 15 days, so he decides to go from the first day to the last day of his vacation at his parents' house. Ricardose stays at his parents' house from 10 until just before August 20