Safe - quite probably
Tasty - probably not.
Yes, its safe , it wont hurt you, but i wouldn't recommend it. thaw it first.
no
NO!
Years.
If you are referring to a raw steak that has been thawing in the fridge (at proper settings) for the past 3 days, then it is probably safe to cook and eat as long as it was safe to cook and eat prior to being frozen.
If it was safe to eat when frozen and has not turned rancid or otherwise become inedible, it shouldn't make you sick if you choose to eat it.
no
no
If the steaks have been wrapped tightly and there is no freezer burn, they should be safe to eat. Frozen food will essentially be safe indefinitely, however it will lose quality the longer it is frozen.
No, it is not safe to defrost steak on the counter as it can lead to bacterial growth and foodborne illness. It is recommended to defrost steak in the refrigerator or using a microwave.
Microbiologically, it would be safe. Palatability is another question.
Steak is safe to eat when it reaches an internal temperature of 145F (63C) according to the USDA guidelines.