Answer:
UCS-- Getting squirted going for cake
UCR-- Upset for getting squirted, go away
CS -- Wanting Cake
CR -- Avoid cake
Explanation:
An Unconditioned Stimulus (UCS) produces an Unconditioned Response, which is a natural response to a certain stimulus which has not been taught. So in this case, the initial Stimulus of squirting Patrick with a water gun when he goes for cake (UCS), produces a natural response from Patrick (UCR), which is probably of getting annoyed and going away. The Conditioned Stimulus (CS) happens when a Neutral Stimulus (NS) is associated with the Unconditioned Stimulus (UCS), in this case, the thought of getting wet when wanting cake becomes the Conditioned Stimulus (CS), producing a Conditioned Response (CR) of staying away from cake altogether to avoid getting squirted.