1 - evaluate the line integral

(i used S as the integration sign)

SF.dr

c

whereF=xi-zj+2yk

and c is the triangular path from(0,0,0)to (1,1,0) to (1,1,1) and back to (0,0,0)

2 - evaluate the line integral

SF.dr

c

F=(3x^2)i+2yzj+(y^2)k

where c is any path between the point (0,1,2) and (1,-1,7)

Any ideas on how to solve these, i'm at a complete loss