How hard is it to change the ball joints in this truck,and is it needed? on 1998 Mazda B4000

I find my that the rubber boots on the ball joints in my truck are all rotting.

Asked by for the 1998 Mazda B4000
are they upper or lower ball joints
it is both of them
remove the nuts on the ball joints then scerw the nuts back on a couple of turns then hit the contorl arm until the ball jonts pop loose if the control arms are aluminum then you should use a pickle fork to try and bust them loose