5
Half a hole is still a hole, so the answer is five!
None
Art Wall Jr. had 44 hole in ones in PGA Play.
12
4.5
He had 17 hole in ones.
Arnie had 16 hole in ones in offical tournaments but he also had a few more that were not during tournaments.Believe his total is 18 or 19 holes in one,
Not a single one - but possibly many small ones.
34. And, with the exception of his putter, he hit a hole-in-one with every club in his bag.
That depends on which hole. Shorter holes will have more common hole in ones than long ones. In general, still very rare.
The general rule for planting seeds is to put three seeds in the hole, and then prick out the weakest ones, once they have germinated.