An air parcel with mass = 150 kg is traveling at 15 m s-1 due east at 38ºN at an altitude of 5500 m. The parcel also has a downward velocity of 2 m s-1. Assume that the parcel is at the 500 mb level within a horizontal pressure field that increases toward the northeast at a rate of 4 Pa km-1 Find the Pressure Gradient Force