3. A curve C in space is given as the triangle that begins at (-1,0,7) until(5,4,-2), from (5,4,-2) to (-3,1,4) and then, from (-3, 1, 4) to (-1,0, 7). Hence, Ccan be seen as the union of the curves C₁, C₂ and C3, where each of C₁, C2, C3 is one side of the triangle. Give a parametrization of each of C₁, C₂ and C3. For each of them, do it in such a way that each depends of a parameter t with 0 ≤ t ≤ 1. Show all your work and make sure that the orientation of your parametrization follow the right direction given above. (3 points)