The numbers 1, 2, 3, :1, and 5 are written on slips of paper, and 2 slips are drawn at random one at a time without replacement [a] Find the probability that the rst number is 2, given that the sum is 3. [b] Find the probability that the rst number is 3, given that the sum is E. 1 [a] The probability that the rst number is 2, given that the sum is 3 is E. [Simplify your answer.) [b] The probability that the rst number is 3, given that the sum is B is I]. {Simplify your answer]