\fHomework: Section.. Question 10, 16.1.19 Part 1 of 2 Evaluate x ds, where C is a. the straight line segment x = t, y = 7, from (0,0) to (12,6) b. the parabolic curve x = t, y = 2t , from (0,0) to (3, 18) .. . . . a. For the straight line segment, | x ds = (Type an exact answer.) C