21. [0/0.86 Points] DETAILS PREVIOUS ANSWERS SCALC9 15.6.046. 1/6 Submissions U Find the mass and center of mass of the solid E with the given density function p. E is the tetrahedron bounded by the planes x - 0, y - 0, z = 0, x + y + z = 4; p(x, y, z) = 4y. m = ( x. V. =) - (1 X Need Help? Read it