Triangle PQR has vertices P(-4,4), ((-4,-3), and R(3,-3). Which best describes triangle PQR?
A. an isosceles triangle with Segment PQ = Segment PR
B. an isosceles triangle with Segment PQ = QR
C. A right triangle with Segment PQ I Segment PR
D. A right triangle with Segment PQ I Segment QR

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)