Find a vector parametric equation F (f) for the line through the points P = (2,4, -2) and QQ = (-1,7, -6) for each of the given conditions on the parameter (a) W F(0) = (2, 4, -2) and F(4) = (-1,7, -6), then F() = (bj if F(7) = P and r(9) = Q. then F(!) = [c) W the points ) and () correspond to the parameter values f = 0 and ( = -3, respectively, then F() =