"backwards slowly" or "slowly backwards"

... that's the question.

Do you say

(a) He moved backwards slowly.

or

(b) He moved slowly backwards.

?

I'm sure that (a) is correct, but what about (b) ?
Thanks in advance!
tom

(c) He slowly moved backwards.

Any of them. In order of use: a, b, c.

(d) Slowly, he moved backwards.

For me its "backwards slowly"

I've got a bit of a Latin influence on my syntax so adjectives come after verbs

Lex.... it's adverb. But I know what you mean.

Thank you very much for your answers and additional word orders.
tom

a) is correct.

Have you noticed Star Trek "boldly goes" when it should "go boldly"?.

#1, sure.
First, where; then how.

Except if you want to put emphasis on 'how' or 'he'.