Read the following short paragraph and answer the question:
Gabriel is a student in high school in Trujillo. He wants to study at UNT. He is 18 years old. He is a mischievious and intelligent teenager. Also, he studies English online. He loves sports and shares with friends in his free time. Sharon has a younger sister. Her name is Sharon. Sharon is 17. They live with their grandparents Oswaldo and Esther. Esther is 70 years old and Oswaldo is 80.
How old is Gabriel: