PLEASE ANSWER ALL PARTS

1. List 3 principles of Internal Component Design
2. SKETCH : You have considered a business case of [Truck Builder] where a typical Truck could have [Parts], the Parts could be either Transmission or Battery. Transmission could be either a manual or automatic. The Battery could be either a Regular or Hybrid battery. You are going to create [Parts interface]; the concrete classes Transmission or Battery will implement the Parts interface. We then create Truck Builder to build different types of Truck objects by combining the Part. Based on this description, sketch the structure for the Builder pattern?

Based on the given figure, Show the difference between internal and external nterface? Based on the given figure, Show the difference between internal and external nterface