Based on the example of "Family Relationships" given in module $12,$ consider the following facts and rules are known:

$\%$ Facts

parent$($john$,$ mary$).$

parent$($john$,$ susan$).$

parent$($john$,$ peter$).$

parent$($john$,$ frank$).$

parent$($paula$,$ mary$).$

parent$($paula$,$ susan$).$

parent$($paula$,$ peter$).$

parent$($paula$,$ frank$).$

male$($john$).$

male$($peter$).$

male$($frank$).$

female$($paula$).$

female$($mary$).$

female$($susan$)$

$\%$ Rules

father$($X$,$ Y$)$ :$-$ parent$($X$,$ Y$),$ male$($X$).$

mother$($X$,$ Y$)$ :$-$ parent$($X$,$ Y$),$ female$($X$).$

sibling$($X$,$ Y$)$ :$-$ parent$($Z$,$ X$),$ parent$($Z$,$ Y$),$ X $\backslash =$ Y$.$

Define the following rules only using the information given above:

$1.$ son$($X$,$ Y$).$ X is the son of Y$.$

$2.$ daughter$($X$,$ Y$).$ X is the daughter of Y$.$

$3.$ sisters$($X$,$ Y$).$ X and Y are sisters.

$4.$ brothers$($X$,$ Y$).$ X and Y are brothers.