5. A special whole life insurance on (40) makes non-level death benefits at the end of year of death. The first death benefit is 10,000. Each subsequent death benefit is 1000 more than the previous death benefit. Suppose i = 9%, and mortality follows De Moivre's model with terminal age w = 120. Calculate the net single premium of this life insurance. = 5. A special whole life insurance on (40) makes non-level death benefits at the end of year of death. The first death benefit is 10,000. Each subsequent death benefit is 1000 more than the previous death benefit. Suppose i = 9%, and mortality follows De Moivre's model with terminal age w = 120. Calculate the net single premium of this life insurance. =