Pls answer correctly!! i'll mark you as if it is correct!

Find the greatest common factor of 28 and 35

What is the reflection image of (5,-3) across the line y = -x?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?