Atechnician who specializes in repairing only one type of automotive system is a/an

A technician who specializes in repairing only one type of automotive system is a specialty technician.
This means that this type of a technician deals with the repair of only one part of a system, be it brakes, suspension, or radiator. Usually, these technicians are better than those 'all around' technicians, at least when it comes to the repairs of one particular part of a vehicle.

It is c) binge drinking alcohol 

To solve this integral, what you can do is split it up as follows: (1) ∫40(x2−4)dx=∫40(x2)dx−∫40(4)dx. to integrate  4  as an  indefinite integral, a good rule of thumb is  by  an equation below  for  polynomials; . (2) ∫xa=xa+1a+1+c , where a is any number. c denotes some constant that is crucial when doing