Classify the following elements as metal or non-metal * 10 points

Nitrogen-

Calcium-

Magnesium-

Oxygen-

carbon-

Sodium-

Copper-

Gold-

Fluorine-

sulfur-​

Jackson, who works in the finance department of a company, is holding a seminar for other employees on how to file taxes. only three employees sign up to attend the seminar. which device can he use to share his presentation with a group of three employees?