Quadratic Vertex Word Problems

Professional soccer player Mia Hamm can kick a soccer ball with the initial velocity $v_{0}$ of $27$ meters per second! Assuming she kicks the ball directly up from a half meter above ground level ($h_{0}=0.5$), use the equation $h(t)= -\frac12gt^2+v_{0}t+h_{0}$ and complete the square to find out how many seconds pass before the ball is at the highest point of its trajectory. Use $9.8$ as the force of gravity $g$.