Please help me answer/perform the following with complete solution, I am really bad at STATS :

14. Among the 200 inmates of a prison, some are first offenders, others are second offenders, still other are serving longer sentences. The exact breakdown is Sentences less : Longer than 2 years : sentences First offenders 60 20 Second offenders : 40 80 15. If one of the inmates is to be selected at random to be released, S is the event that he is second time offender, and L is the event that he is serving a longer sentence, determine each of the following probabilities directly from the entries of the row and column totals of the table: a) P (S) P (S'L) b) P (L) P (L/S) C) P (LS) f) P (S' /L)