Please help. This isnt a tru or false.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

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

If the discriminant if a quadratic equation is 4 which statement describes the roots?