applied mathematics help find the period and amplitude of motion and a

[Simon H]

particular solution? a block P of mass m lies on a smooth plane AB that is inclined at angle of (alpha) to the horizontal. the block is attatched to the bottom of the plane,A, by a spring of stiffness 2k and natural length Lo . a second model spring of stifness 3k and natural length 2Lo is now attatched to the block, and its other end is fixed at B at a distance 5Lo up the plane from A.
a) the block is initially released from rest from the equilibrium position. i need to find the particular solution of the differential equation that satisfies these initial conditions.
b)i need to write down the period and amplitude of the subsequent motion

if some one could please go through it with me step by step i would be very thankfull .