The following parts are not related.

Part (1) Determine the volume of a parallelepiped defined by the vectors u=[2,5,1], v=[4,0,1] and w=[3,2,2]

Part (2) Rounded to the nearest degree, determine the measures of the interior angles of the triangle with vertices P(1,2,1), Q(2,5,6) and R(3,8,5)