Susan is a geneticist studying longevity. A recent study asserts that the ages of the redwood trees in a certain forest have a population mean of 1261 years with a population standard deviation of 314 years. To help evaluate if the study's assertion is true, Susan looks at a sample of 10 of these trees. These trees have a sample mean age of 1120 years and a sample standard deviation of 276 years. Fill in the blanks below with the proper notation for the population mean, the population standard deviation, and the sample standard deviation. Population mean: = 1261 years Population standard deviation: = 314 years Sample standard deviation: = 276 years