Answer the following question precisely.

The integrated hazard for mortality for a group of lives over the period (0,?), where r is measured in weeks, is being modelled by the function: H(!) =1- (1 + exp[(1-2)/3]}- (i) Find an expression for h(), the hazard function at time /. [2] (ii) Sketch a graph of h(t). [5] (iii) Suggest a context where a hazard function with this shape might be appropriate. [2] [Total 9]