1. Compute for the path C consisting of the first-quadrant portion of a circle (centered at the origin) of radius 3 traversed counterclockwise, along with the line segments from (0,3) to (0,0) and from (0,0) to (3,0).
 
 

2. Compute div (sin x i + cos x j - z² k).
 
 

3. Compute curl (x i + e^y sin z j + e^y cos z k)