P27

Vav = Dx / Dt = (4 - 2) m / (8 - 2) s = 1/3 m/s    

P37

Dz = 1 m,   Dx = 1 m,

DL = (Dx**2 + Dz**2)**(1/2) = 1.41 m

P59

V = 43/10 = 4.3 m/s

V = 3/10 0.33 m/s southward

P89

VN = 100 m/s,   VE = 200 m/s,

Net velocity of the probe is

V = (100**2 + 200**2)**(1/2) = 224 m/s in the N-E-E direction