1. Given survived to time s= 6 months, what is the probability of surviving an additional t=3 months. Lambda=0.20

CS (3|6) = Pr (T> 3+6|T>6) = S(3+6)/S(6)

= S(9)/S(6) = S(3)

S(3) = exp(-0.2*3) = Pr(T>t)

S(3) = 0.5488 ~ 54.9%

What is the Conditional mortality/failure probability:CM(t | s)=Pr(ss) = 1 - CS(t | s)