POINT (2, 2, 1) : X = 2; y =2; z =1U̅ = {4 × (2)2}i – {5 × (2)2× 2} j + 1kU̅ = 16i- 40 j+ kThe magnitude of VELOCITY is given by:\(u = \sqrt {{{\left( {16} \RIGHT)}^2} + \;{{\left( { - 40} \right)}^2} + \;{{\left( 1 \right)}^2}} = \;\sqrt {1857\;} \) m/s∴ u = \(\sqrt {1857\;} m/s\)