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Help with Bridge Probability

North
KJ43
AQ104
A4
KQ5
South
AQ2
K32
KQ32
432
W
N
E
S
6NT
P
P
P

I'm looking for help understanding how probabilities change as more information is learned about opponents' distribution.

Say that opponents lead a spade, you cash two hearts (both following with low cards) and then you lead a club to the king and it wins.  For simplicity sake, assume that E will duck the club 100% of the time (such that no inference can be made as to the location of the Ace of clubs) and that no inference can be drawn from the lead. I am curious as to how to compute the probabilities of (1) the heart finesse (2) the heart drop and (3) the club finesse if:

(A) Spades split 3-3

(B) Spades split 1-5 (E having 5)

I'm aware that there is a lot more to this hand than simply the three options I listed above (combining chances, various squeezes, etc.) and feel free to discuss your line.  But I'm more interested in learning how probability works to help analyze future hands.

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