Fifty-two percent of the students at a certain college are females. Five percent of the students in this college are majoring in computer science. Two percent of the students are women majoring in computer science. If a student is selected at random, find the conditional probability that
(a)     this student is female, given that the student is majoring in computer science;
(b)      this student is majoring in computer science, given that the  student  is female.