Question: Check that the four points P(2, 4, 4), Q(3, 1,6), R(2, 8, 0), and S(9,2, 1) all lie in a plane. Then use vectors

Check that the four points P(2, 4, 4), Q(3, 1,6), R(2, 8,

Check that the four points P(2, 4, 4), Q(3, 1,6), R(2, 8, 0), and S(9,2, 1) all lie in a plane. Then use vectors to find the area of the quadrilateral they define. (Use symbolic notation and fractions where needed. Enter DNE ifr the points do not lie in a plane. ) A =

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