r = sqrt(14) (radius), θ = cos^(-1)(sqrt(2/7)) (polar angle), ϕ = tan^(-1)(3) (azimuthal angle)

sqrt(14)

(1/sqrt(14), 3/sqrt(14), 2/sqrt(14))

(1/sqrt(14), 3/sqrt(14), sqrt(2/7))

x = t, y = 3 t, z = 2 t for 0<=t<=1