Question textConsider two lines [math: (−1,1,−2)+s(2,1,−2)] and [math: (1,2,−1)+t(0,1,−1)].a) A normal vector to both lines is [math: (1,]Answer 1 Question 2[input], Answer 2 Question 2[input][math: )].b) The vector from [math: (1,2,−1)] to [math: (−1,1,−2)] is [math: (] Answer 3 Question 2[input], Answer 4 Question 2[input], Answer 5 Question 2[input] [math: )].c) The distance between the two lines is Answer 6 Question 2[input].多项填空题