A 4.08kg particle with velocity vec(v)=(5.42(m)/(s))hat(i)-(3.97(m)/(s))hat(j) is at x=5.83m,y=7.90m. It is pulled by a 6.65N force in the negative x direction. About the origin, What are (a) the particle's momentum and (b) the net force acting on the particle?