A bar of length = 1 has one fixed and one free end and stiffness function

Question:

A bar of length ℓ = 1 has one fixed and one free end and stiffness function c(x) = 1 - x. Find the displacement when subjected to a unit force. Pay careful attention to the boundary condition at the free end-what does it say about the displacement k(1) and the strain u'(!)?