Calculus 3

Find a vector parametric equation t) for the line through the points P = (411,4) and Q = (9, 3? ~4) for each of the given conditions on the parameter r. (a) If ?(0) = (4, 1,41) and ?(3) = (_9,3, 4), then F0) = (b) If 7(5) : P and H8) : Q, then ?(r) = (c) If the points P and Q correspond to the parameter values I = 0 and r = ~3, respectively, then F7T")