(2-2) In relatives. pl file, write and add the following rule. ancestor(X, Y) : X is an ancestor of Y Run ancestor(brown, X). Submit all generated result for X by running your program. (2-3) In relatives. pl file, write and add the following rule. descendent(X, Y): X is a descendent of Y Run descendent(david, X). Submit all generated result for X by running your program. (2-4) In relatives. pl file, write and add the following rules. fatherinlaw(X, Y): X is a fatherinlaw of Y Run fatherinlaw(X, Y). Submit all generated result for X and Y by running your program. (2-5) In relatives. pl file, write and add the following rules. niece(X, Y): X is a niece of Y Run niece(X, Y). Submit all generated result for X and Y by running your program. If you need an operation not, use the operator "not" ( \== ), like X\==Y.