Hello,

Nope. See there is a path from a, b and c to k, l and m

have a look at k.b)least upper bound of {a,b,c} my answer -> l

I'd say, yes ^^c)lower bounds of {f,g,h} my answer -> none

d)greatest lower bound of {f,g,h} -> none

There are worseThis diagram is really weird!