8. Evaluate the line integral R
C
(xy + y + z)ds along the curve r(t) = 2ti + tj + (2 − 2t)k, 0 ≤ t ≤ 1

Evaluate the integral. 20 17) 0 Evaluate the line integral along the curve C. 18)| (xz + y2) ds, C is the curve r(t) = (-5-t)ǐ + 2tj_2tk , 0 st sl 18)

Evaluate the line integral along the curve C. 18) (xz + y2) ds, C is the curve r(t) = (-5-t)i + 2tj-2tk, 0 t 1