The net single premium for a pure endowment of 10,000 issued at age X for n years is 8000 if the premium is to be returned in the event of death before age x-\-n. If the premium is not returned, the net single premium is 7000. Find the net single premium for a pure endowment of 10,000 issued at the same age and for the same period if half of the net premium is to be returned in the event of death.