Consider the piecewise linear bathtub hazard function defined over the three regions of interest given below. The constants in the expressions are determined so that they satisfy the normal requirements for h(t) to be a hazard function. 

[h(t)=Db-ct, h(1)={h;(1)=b- G4 - c2(1-4), h(t)%3Db-G4-c(12-4)+c(t-1),