Which two sentences are examples of technical writing?

Rick entered the room with caution and glanced around quickly to ensure that everything was still in place.
The research indicated that mule deer density exhibits a linear relationship with plant productivity.
A fully grown African lion is known to weigh up to a staggering 550 pounds.
Rangers will be required to follow new habitat maintenance procedures beginning January 1.
The auto-off feature of this coffee machine prevents any type of overheating problems.