You need the story send the story
I think a would be the best answer for the preposition
The hound was of this world
The commutative property states
a x b = b x a
So 4 x 5 = 5 x 4 = 20
So both equal to 20
I would have to read the paragraph to give you a proper answer. Could you perhaps take a picture of the paragraph so I may read it?