A rocket is flying in the air with an initial velocity of vi = 30 x + 250my - 75m 2. The velocity of the rocket 25s later is shown in the diagram below as Uf. m |ufl = 65 - Uf S X 110 A. Calculate the norm of vi, using the definition of the norm. Use only approved shortcuts. B. Calculate the angles that the initial velocity vector ; makes with each of the Cartesian unit vectors, when they are drawn tail to tail