In a knowledge representation system, there are two predicates whose arguments are constant symbols associated with geographical regions, The predicates are as follows:

In $(x,y)$:$x$ is in $y$

Borders $(x,y)$: $x$ has border with $y$

Write a logical expression that is a correct representation of $"$No region in North America borders any region in Asia." $[5$ Points$]$

Consider the following Baysian network and write the joint probability sentence that calculates $P(B,W,Y,x,Z,A)$ based on the structure of the network. $[10$ Points$]$

Explain why it is a good heuristic to choose the variable that is most constrained but the value that is least constraining in a CSP search. $[10$ Points$]$