Find a vector parametric equation F(t) for the line through the points P = (1,0,-5) and Q=(2,3,-7) for each of the given conditions on the parameter t. (a) If F(0) (1,0,-5) and (5)= (2,3,-7), then F(t)- - (b) If (3) P and (6) - Q. then M F(t)-0 (c) If the points P and Q correspond to the parameter values t= 0 and t= -2, respectively, then F(t)-

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