Dr. Atkinsоn wаnts tо knоw if Mаry hаs passed his class. He knows that for a student to pass a class they must have good grades and good attendance. He asks himself if Mary has good grades, and realizes that he knows that a student must pass all of their assignments and all of their exams to have a good grade. He asks himself if Mary has good attendance, and realizes that he knows that a student must attend most lectures to have good attendance. Dr. Atkinson checks his knowledge base and sees that Mary passed her exams and assignments and attended most of the lectures, therefore he knows that Mary has passed his class. Is this process an example of top down reasoning or bottom up reasoning? Justify your answer.