Most likely you are, but it also depends on what the person you hit was doing In most circumstances, yes ... it's called "failure to control vehicle" and is usually caused by tailgaiting the car ahead or not paying attention to what is happening. Too many people only see one car ahead when they are driving - they need to be aware what is happening well beyond that. Professional bus drivers are taught to constantly be aware of everything happening about them at all times ... despite having air brakes does not mean that 17 tons can stop on a dime.
yes
Yes, you are. It will be viewed that you were following too closely.
The car that hit you from behind.
is fault of car behind the second car not yours
It is their fault.
If you are hit from behind it is usually always the guy that hit you that is at fault unless you were in reverse backing up
The car behind you
If you changed lanes and hit a car in the lane you are trying to get into you are at fault.
First, you shouldn't be cutting people off. Whom ever hit the other car from behind would be at fault.
you are at fault
The car that hit you from behind is at fault.
Yours. ADDED: Anytime YOU strike something or someone, it is the fault of the striking party.