1. Assuming the parent relation as defined in the following piece of Prolog code, what will be Prolog's answers to the following questions?
parent (pam, bob).
parent (tom, bob).
parent (tom, liz).
parent (bob, ann).
parent (bob, pat).
parent (pat, jim).
a) ?- parent (jim, x).
b) ?- parent (X, jim).
c) ?- parent (pam, X),parent (X, pat).
d) ?- parent (pam, X), parent (X, Y), parent (Y, jim).
2. Formulate in Prolog the following questions about the parent relation:
a) Who is Pat's parent?
b) Does Liz have a child?
c) Who is Pat's grandparent?