100 POINTS| PLEASE ANSWER ASAP|
Mark, Jhon and Stephanie, three archers, are aiming at a target. Each of them has only one shot. Mark has 1/5 chance of hitting the bullseye, Jhon has 1/4 chance and Stephanie has 1/3 chance.
a. what are the chances of the bullseye being hit
b. what are the chances that if only one of them hit the bullseye, Mark was the one who hit it.
c. what are the chances that the bullseye gets hit exactly once