What is the rising action? why does most of a story take place in this stage?

The rising action is the "build up" of a story.Most of the story takes place in here because it is typically the middle of the book/story.After the rising action and climax the story will start to wrap up.

for a and b see pictures attached,

c. Because both the parent nodes for ALARM are known, the probability distribution over  ALARM is independent of the feature STORM. Consequently, we can read the relevant  probability distribution over ALARM directly from the conditional probability table for the ALARM node. Examining the conditional probability table, we can see that when BURGLAR = true, and CAT = true, then ALARM = true is the MAP prediction. In other words,  the network would predict that the alarm would sound in this situation.

d. In this case, the values of the parents of the target feature are unknown. Consequently, we

need to sum out both the parents for each value of the target. The network would calculate

the probability of the event ALARM = true as follows:

see figures