Hi yes i need help This is the 2 one i need to do

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)

Three lines meet at a point. set up and solve an equation to find the value of (a) is your answer reasonable? explain how you know

If a and b are real numbers, then |a-b| is always, sometimes or never equal to |b-a| ?