The Eagles are trying to win in overtime by scoring a field goal. In order for the kicker to successfully make a 54 yard kick the ball needs to reach a maximum height of 24 yards. Find the equation of the parabolic arc of the football, and write the a value in the general equation: y=a(x-h)^2+k = a ( x − h ) 2 + k in the blank below (be sure to write your answer in simplified fraction form, with no spaces).