Ones with varifocal lenses.

Only if they are zoom lenses.

almost all camera lenses are compound meaning that they have more than one element.

Optical zoom uses lenses to focus on objects further away... it is the lenses which do the 'zooming'. Digital zoom is where a photo is taken using the same set of lenses all the time and using software to enlarge the picture.

There are two types of lenses - fixed focal and zoom lenses.

No it does not, it only has 5.8 optical zoom.