Without using a calculator - You are driving a bus from London to Milford Haven in Wales. In London , 17 people get on the bus. In Reading , 6 people get off the bus and 9 people get on. In Swanson , 2 people get off and 4 get on. In Cardiff , 11 people get off and 16 people get on. In Swansea , 3 people get off and 5 people get on. In Carma then, 6 people get off and 3 get on. You then arrive at Milford Haven .. Without scrolling back to review, how old is the bus driver?