I am having some trouble with these questions

1. Suppose that F(x,y)= < -y, x > and C is the circle centered at the origin with radius 3 oriented counterclockwise and starting at (3, 0). Findc F T ds

2. Suppose that F = < 2 + x, 4 y, 9 z > is a vector field, and C is the line segment

from (0, 2, 3 ) to ( 2, 5, 1 ). Findc F T ds

3. Suppose that the vector field F = < y^2, 3 x y > and C is a curve that starts at (0,0) and goes to (1,2) along the parabola y = 2 x^2. Findc F dr