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(14 pts) A triangle has the points P (1, 5, 2), Q(3, 3, 3), and R(3, 9, 6) as its three vertices

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(14 pts) A triangle has the points P (1, 5, 2), Q(3, 3, 3), and R(3, 9, 6) as its three vertices. i. Find the lengths
of the sides of the triangle PQR . ii. Is it an isosceles triangle? Be sure to show your work. iii. Is it a right
triangle? show your work.