In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.
Among four boys, age of Ashish is thrice the age of Varun. Age of Arvind is 1/2 of the age of Varun. Amit is 8 years elder to Varun, but 8 years younger to Ashish. Who is the second eldest?