Hyphens are used to link words together to form compound words, such as "well-being" or "mother-in-law." They can also be used to separate syllables in words that are broken at the end of a line in writing. Additionally, hyphens are used in some prefixes, suffixes, and to avoid ambiguity or confusion in writing.
Hyphens not needed
If you're using the phrase as an adjective (example "This easy-to-use remote is great!") then it will definitely need the hyphens. Otherwise, the hyphens are incorrect.
Yes it should.
no hyphens - 57 years old is what you are.
Hyphens are used to join words together to create compound words, to show a range of numbers or dates, and to connect prefixes and suffixes to root words. They can also be used to clarify meaning in certain instances where words might be confusing without them.
No, you should not.
As long as they're fit for purpose.
There are no hyphens in the word ago.
No. Use hyphens when creating a compound adjective, for example a two-foot width or a four-foot depth.
hyphens
Fit for purpose means good enough to do the job it was made to do.