Differentiate, in detail between a four stroke and a two-stroke IC engine.

A four-stroke internal combustion (IC) engine and a two-stroke IC engine are two major types of engines used in various applications. They differ fundamentally in their working principles, efficiency, fuel consumption, and design. Below is a detailed differentiation between the two:

### 1. Number of Power Strokes per Revolution  
- Four-Stroke Engine: It completes one power stroke in every two revolutions of the crankshaft (i.e., 720° rotation).  
- Two-Stroke Engine: It completes one power stroke in every single revolution of the crankshaft (i.e., 360° rotation).  

### 2. Number of Strokes in a Cycle  
- Four-Stroke Engine: The cycle consists of four strokes—intake, compression, power, and exhaust. Each stroke occurs in a separate phase of crankshaft movement.  
- Two-Stroke Engine: The cycle consists of only two strokes—compression and power. The intake and exhaust _____ _______ _____ _______ ______ ______ __________.
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