test the claim, identify null hypothesis, alternative hypothesis, test statistic, p-value and critical values, and conclusion

Question

The health of the bear population in Yellowstone national park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 bears has a mean weight of 182.9 lb. Assuming the sigma is known to be 121.8lb. use a 0.10 significance level to test the claim that the population mean of all such here weights is less than 200lbs.