There is a decrease of 5 months in the average age of 36 boys of a class, when a new boy comes in place of a boy whose age was 30 years. What is the age of the new boy ?

In a queue of children, Kashish is fifth from the left and Mona is sixth from the right. When they interchange their places among themselves, Kashish becomes thirteenth from the left. Then, what will be Mona's position from the right ?