Basic engine operation can be divided into four stages. these stages (listed in the proper order) are

The answer would be: Intake, Compression, Power, and Exhaust.

Intake: also known as induction or suction.
Compression: starts at the end of the suction stroke, and ends at T.D.C. 
Power: also known as combustion. This is the start of the second revolution of the four stroke cycle.
Exhaust: also known as outlet. In here, the piston once again returns from B.D.C. to T.D.C. while the exhaust valve is open. This action eliminates the spent air-fuel mixture through the exhaust valve.

Answer the discount rate

  the tendency to view one's own culture  and  group as superior  is called. cultural relativism.