A 100 g bead slides along a frictionless wire with the parabolic shape y = (2 m

Question:

A 100 g bead slides along a frictionless wire with the parabolic shape y = (2 m^-1)x².
(a) Find an expression for a_y, the vertical component of acceleration, in terms of x, v_x, and a_x.
(b) Suppose the bead is released at some negative value of x and has a speed of 2.3 m/s as it passes through the lowest point of the parabola. What is the net force on the bead at this instant?
Write your answer in component form.