Please EXPLAIN and solve EACH/ALL part(s) in Question #4!

DOUBLE CHECK YOUR WORK AND ANSWER(S).

PLEASE NEATLY SHOW ALL WORK, EXPLANATIONS, & CALCULATIONS STEP-BY-STEP USING PEN AND PAPER! I AM NEW TO PHYSICS! I AM A COMPLETE NEWBIE!

Question 4 10 pts Identical twins, Samantha and Betty, stand on a bridge over a body of water. They each throw a stone into the water below at the exact same time, however Samantha throws her stone upwards with an initial speed of 3.35 m/s and Betty throws her stone downwards at the exact same speed. How far apart, in seconds, are the splashes of the rocks, assuming the height of the bridge is 27.2 meters