Can someone me out with these questions?

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

Do you mind if you guys me with this question i’m on number 8

Consider the following function. which of the following graphs corresponds to the given function? w. x. y. z. a. z b. y c. x d.