Commas should always be placed around

NON-RESTRICTIVE MODIFIERS!

Explanation:

Non-restrictive modifiers are parts of a sentence that are "added on".

Like this:

The apple, which was red, was very tasty.

The 'which was red' part of the sentence was the non-restrictive modifier. The non-restrictive modifier of this sentence, or any sentence, is an added on/irrelevant section of the sentence, which must have two commas around it to separate it from the rest of the sentence.

I hope this helps!

- sincerelynini

i will try let me see what they are first

1, 4, and 5 are all conflicts