Answer:
They are made by living things.
Explanation:
humans are living things, thus do not make vitamins.
Answer:
trial and error, some engineering abilities.
Explanation:
The general skills required for research projects on anesthetic dose measurement and delivery systems or for investigating the properties and effects of different medications are trial and error, some engineering skills. The so-called trial and error ability will allow you to try a method or system, see if it works and its effects, and not work or produce the desired effects by trying a new method. Engineering abilities will be required to manage these attempts and establish a logical sequence between them.
The average time for your age to run a mile is 6-8 minutes but at max 6-10 minutes.
