We consider the two points P(1, 2, 1) and Q(2,-1,1). Determine the symmetric equations of the line passing through the points P and Q. Assume that R(3, -4,-3) is another point. Assume you want to show using the symmetric equations of the line that the three points are collinear. Find the value (s) for the parameter t for which R-P+tV implies the three points are collinear, where Vis tip of the vector PQ.