What is the velocity at the midway point of a ball able to reach a height y when thrown with an initial velocity

Question

v0?
(Assume the ball is thrown upward and that up is the positive direction. Use the following as necessary: y and g. )

Answer 1

Vf^2 = Vo^2 + 2gd,
Vf^2 = Vo^2 + 2*9.8*(y/2),
Vf^2 = Vo^2 + 9.8y,
Vf = sqrt(Vo^2+9.8y).