The cofactors of the first-row entries are .
1.-407,-74,227
2.-407,-68,287
3.-393,-74,287
4.-393,-68,227
The cofactors of the second-row entries are .
1.-471,222,-91
2.-471,228,-71
3.-469,222,-91
4.-469,228,-71
The cofactors of the third-row entries are .
1.249,-222,349
2.249,-217,-351
3.251,-222,349
4.251,-217,-351

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x,y,z) = (1,-x,z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)