A particle of mass 1.1 kg moves under the influence of a potential

Question

U(x) = a/x + bx (a=3 and b=2.5). The particle's motion is restricted to the region x>0.
the force acting on the particle is a/x^2 - b
the point of equilibrium of the particle is 1.10 m
a) What is the minimal work required to move the particle from the equilibrium point to 5.48 m?
b) The particle is released from the rest at 5.48 m. What is the minimal distance from x=0 that it will reach? and what is its maximum velocity?