Can you guys help me out with this? Thanks! <3

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Ineed i been stuck on this question since yesterday

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !