2does the figure have rotational symmetry? if it does, find the angle of rotation.

a. yes: 30
b. yes: 60
c. yes: 72
d. no

4. find the coordinates in the image of point r(3,-5) rotated 180 about the origin.

a. (-3, 5)
b. (-5, -3)
c. 5, 3)
d. 3, -5)

p. s the star is for the first question

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)