1000 units are stress-tested for 1000 hours. Readouts to check for failures take place at 24, 48, 96, 168, 500, and 1000 hours. These readouts are 19, 28, 32, 34, 35, and again 35, respectively. The remaining 965 test units survive the 1000-hour test. Estimate the failure function and the reliability function at the end of each readout interval. Estimate the hazard rate during each interval