A group of 12 hemophiliacs, all under 41 years of age at the time of HIV seroconversion, were followed from primary AIDS diagnosis until death (ideally, we should take as a starting point the time at which a person contracts AIDS rather than the time at which the patient is diagnosed, but this information is not available). Survival times (in months) from diagnosis until death of these hemophiliacs were: 2, 3, 6, 6, 7, 10, 15, 15, 16, 27, 30, and 32. Calculate and graph the Kaplan- Meier curve.