What does the word suffix -er mean in the word performer

Which words share a word root with educate

The one certain thing about the message you sent to the receiver is that the receiver will: a)process the information sequentially, not simultaneously. b)interpret it based on their framework of experience. c)not be able to interpret all the relevant information. d)revise his/her premises according to the information sent.

What does the video on the wilderness downtown website incorporate to create the end product?