Magnitude of force question? Chain link

[theunloved]

A chain consisting of five links, each of mass 0.1 kg, is lifted vertically with a constant acceleration of a = 2.5 m/s2. Find the magnitude of
(a)the force on link 1 from link 2
(b)the force on link 2 from link 3
(c)the force on link 3 from link 4
(d)the force on link 4 from link 5

I have no idea where to start it from...can anyone help me out in this problem ?

 

[ehild]

Make a picture and draw all forces acting on the individual links.ehild