In English, apostrophes indicate either possession or omission.

An example of possession might be

The cat's bed,

Or, in the plural,

The cats' bed.

(A good example of an omission is in a contraction, such as isn't for is not."

But an apostrophe is never (correctly) used it English to mark a plural. So, to answer your question, there should be no apostrophes in that phrase. It's correct as-is.

NOTE: Sometimes you will see an apostrophe before a final -s that does indeed mark a plural. Ben Franklin (if I recall correctly) and his contemporaries would do this. There are also technical contexts where it might be done (although more often with past tense verbs (e.g. malloc()'d).

In English, apostrophes indicate either possession or omission.

An example of possession might be

The cat's bed,

Or, in the plural,

The cats' bed.

(A good example of an omission is in a contraction, such as isn't for is not."

But an apostrophe is not often (correctly) used it English to mark a plural of a regular noun. (However, decades or centuries (80's, 90's, 1500's), and some brands and abbreviations (M&M's, sometimes Lego's) may have an apostrophe; it depends on what style you adhere to.)

But, to answer your question directly, there should be no apostrophes in that phrase. It's correct as-is.

NOTE: Sometimes you will see an apostrophe before a final -s that does indeed mark a plural. Ben Franklin (if I recall correctly) and his contemporaries would do this. There are also technical contexts where it might be done (although more often with past tense verbs (e.g. malloc()'d)).