The table below provides some information about students at a certain college. find the probability that a student selected at random has the following conditions. (round your answers to four decimal places.)
(a) the student is a senior.

(b) the student is working full time.

(c) the student is working part time, given that the student is a first-year student.

(d) the student is a first-year student, given that the student does not work.

(e) the student is a junior or senior, given that the student does not work.

(f) the student is working part time or full time, given that the student is a sophomore or a junior.