a-star

functions in lisp

Hi.... I have this question for a homework assignment.... I'm having difficulty with cost-of-applying-operator and estimated-distance-from-goal Basically its the 2 jug problem one 4ltr jug and one 3 ltr jug and we need to get 2 ltrs in one... we're provided with the a-star code and i've done the jug-problem.lisp just not sure how to w...