The third task.

1)
1.Vacuum cleaner
2.Smartphone
3.Autopilot
4.Internet
5.Wi-Fi

2)

1.A Laptop is a personal computer designed for mobile use.

2. A dishwasher is a mechanical device for cleaning dishes and eating utensils.

3. A fridge a device used to reduce the rate of spoilage of foodstuffs.

4. A hair-drier is an electromechanical device designed to blow cool or hot air over wet or damp hair, in order to accelerate the evaporation of water particles and dry the hair.

5. A microwave oven is a kitchen appliance that heats food by dielectric heating.