The first is a Last Will and Testament, which describes how an individual wants their property (the legal term is "bounty") distributed after passing.
The other three are essential while an individual is living.
Durable Power of Attorney – someone who can make financial decisions, access digital assets, do planning for government benefits, sell propertyHealth Care Surrogate – someone who can make talk to doctors and make medical decisions if you’re not ableLiving Will – how you want end-or-life situations handled from letting you pass as soon as it’s determined there is no reasonable medical probability of recovery to being kept alive at all costs