Read the following passage and answer the questions

Nga is twelve years old. She is in grade six, class 6A1. She lives in a house with her mother, father and sister. Their house is next to a bookstore. In the neighborhood, there is a hospital, a market and a stadium. Nga's father is a doctor. He works in the hospital. Her mother works in the super market. Nga goes to school at six- thirty in the morning. She has classes from seven to eleven thirty.

How old is Nga?

.....................................................................................................................