Find the total mass of a mass distribution of density o in a region T in space. 1. o = x +y- + z, T the box x =4, ly =1, OSZE2 2. 0 = xyz, T the box 0 Ex E a, Ofyeb, OzEC 3. 0= e-*-y-Z, T: OSx=1-y, OSys1, OSZE2 4. o as in Prob. 3, T the tetrahedron with vertices (0, 0, 0), (3, 0, 0), (0, 3, 0), (0, 0, 3)