Exercise 1Extend the program by adding rules for the following family relationships (add more people if
necessary, so that you can check your results):
| brother(X, Y) | where X is Y’s brother |
| sister(X, Y) | where X is Y’s sister |
| son(X, Y) | where X is Y’s son |
| daughter(X, Y) | where X is Y’s daughter |
| married(X, Y) | where X is married to Y |
| ancestor(X, Y) | where X is Y’s ancestor |
What problems do you encounter? What is the nature of the problems? What solutions (if any) can you suggest. (Reading the literature on Prolog will help.)