When a balloon is filled with Helium and floats in the air, the Helium provides the Buoyant force. True or false​

Will you chech and finish these for me, because i am stumped with them.

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Match each scenario to the form of energy it represents