Trapezoid EFGH has the following measurements, where EF is a base and h represents the altitude. EF = 7 cm, FG = 9 cm, GH = 24 cm, HE = 5 cm, h = 3 cm What is the length of the median of the trapezoid?

46.5 cm
14.5 cm
15.5 cm
22.5 cm